diff --git a/examples/hey_snips/README.md b/examples/hey_snips/README.md
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/hey_snips/kws0/RESULTS.md b/examples/hey_snips/kws0/RESULTS.md
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/hey_snips/kws0/path.sh b/examples/hey_snips/kws0/path.sh
new file mode 100755
index 00000000..54a430d4
--- /dev/null
+++ b/examples/hey_snips/kws0/path.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+export MAIN_ROOT=`realpath ${PWD}/../../../`
+
+export PATH=${MAIN_ROOT}:${MAIN_ROOT}/utils:${PATH}
+export LC_ALL=C
+
+export PYTHONDONTWRITEBYTECODE=1
+# Use UTF-8 in Python to avoid UnicodeDecodeError when LC_ALL=C
+export PYTHONIOENCODING=UTF-8
+export PYTHONPATH=${MAIN_ROOT}:${PYTHONPATH}
+
+export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib/
+
+MODEL=mdtc
+export BIN_DIR=${MAIN_ROOT}/paddlespeech/kws/exps/${MODEL}
\ No newline at end of file
diff --git a/examples/hey_snips/kws0/run.sh b/examples/hey_snips/kws0/run.sh
new file mode 100755
index 00000000..69b1ad6a
--- /dev/null
+++ b/examples/hey_snips/kws0/run.sh
@@ -0,0 +1,47 @@
+#!/bin/bash
+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+. ./path.sh
+set -e
+
+stage=0
+stop_stage=50
+
+# data directory
+# if we set the variable ${dir}, we will store the wav info to this directory
+# otherwise, we will store the wav info to vox1 and vox2 directory respectively
+# vox2 wav path, we must convert the m4a format to wav format    
+dir=data/                                 # data info directory   
+
+exp_dir=exp/ecapa-tdnn-vox12-big/            # experiment directory
+conf_path=conf/mdtc.yaml          
+gpus=0,1,2,3
+
+source ${MAIN_ROOT}/utils/parse_options.sh || exit 1;
+
+mkdir -p ${exp_dir}
+
+if [ $stage -le 0 ] && [ ${stop_stage} -ge 0 ]; then 
+     # stage 0: data prepare for vox1 and vox2, vox2 must be converted from m4a to wav
+     bash ./local/data.sh ${dir} ${conf_path}|| exit -1;
+fi
+
+if [ $stage -le 1 ] && [ ${stop_stage} -ge 1 ]; then
+     CUDA_VISIBLE_DEVICES=${gpus} bash ./local/train.sh ${dir} ${exp_dir} ${conf_path} 
+fi
+
+if [ $stage -le 2 ] && [ ${stop_stage} -ge 2 ]; then
+     CUDA_VISIBLE_DEVICES=0 bash ./local/test.sh ${dir} ${exp_dir} ${conf_path}
+fi
diff --git a/paddlespeech/kws/exps/mdtc/compute_det.py b/paddlespeech/kws/exps/mdtc/compute_det.py
new file mode 100644
index 00000000..19a3fe14
--- /dev/null
+++ b/paddlespeech/kws/exps/mdtc/compute_det.py
@@ -0,0 +1,121 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import json
+import os
+import sys
+
+from tqdm import tqdm
+
+
+def load_label_and_score(keyword, label_file, score_file):
+    # score_table: {uttid: [keywordlist]}
+    score_table = {}
+    with open(score_file, 'r', encoding='utf8') as fin:
+        for line in fin:
+            arr = line.strip().split()
+            key = arr[0]
+            current_keyword = arr[1]
+            str_list = arr[2:]
+            if int(current_keyword) == keyword:
+                scores = list(map(float, str_list))
+                if key not in score_table:
+                    score_table.update({key: scores})
+    keyword_table = {}
+    filler_table = {}
+    filler_duration = 0.0
+    with open(label_file, 'r', encoding='utf8') as fin:
+        for line in fin:
+            obj = json.loads(line.strip())
+            assert 'key' in obj
+            assert 'txt' in obj
+            assert 'duration' in obj
+            key = obj['key']
+            index = obj['txt']
+            duration = obj['duration']
+            assert key in score_table
+            if index == keyword:
+                keyword_table[key] = score_table[key]
+            else:
+                filler_table[key] = score_table[key]
+                filler_duration += duration
+    return keyword_table, filler_table, filler_duration
+
+
+class Args:
+    def __init__(self):
+        self.test_data = '/ssd3/chenxiaojie06/PaddleSpeech/DeepSpeech/paddlespeech/kws/models/data/test/data.list'
+        self.keyword = 0
+        self.score_file = os.path.join(
+            os.path.abspath(sys.argv[1]), 'score.txt')
+        self.stats_file = os.path.join(
+            os.path.abspath(sys.argv[1]), 'stats.0.txt')
+        self.step = 0.01
+        self.window_shift = 50
+
+
+args = Args()
+
+if __name__ == '__main__':
+    # parser = argparse.ArgumentParser(description='compute det curve')
+    # parser.add_argument('--test_data', required=True, help='label file')
+    # parser.add_argument('--keyword', type=int, default=0, help='keyword label')
+    # parser.add_argument('--score_file', required=True, help='score file')
+    # parser.add_argument('--step', type=float, default=0.01,
+    #                     help='threshold step')
+    # parser.add_argument('--window_shift', type=int, default=50,
+    #                     help='window_shift is used to skip the frames after triggered')
+    # parser.add_argument('--stats_file',
+    #                     required=True,
+    #                     help='false reject/alarm stats file')
+    # args = parser.parse_args()
+
+    window_shift = args.window_shift
+    keyword_table, filler_table, filler_duration = load_label_and_score(
+        args.keyword, args.test_data, args.score_file)
+    print('Filler total duration Hours: {}'.format(filler_duration / 3600.0))
+    pbar = tqdm(total=int(1.0 / args.step))
+    with open(args.stats_file, 'w', encoding='utf8') as fout:
+        keyword_index = int(args.keyword)
+        threshold = 0.0
+        while threshold <= 1.0:
+            num_false_reject = 0
+            # transverse the all keyword_table
+            for key, score_list in keyword_table.items():
+                # computer positive test sample, use the max score of list.
+                score = max(score_list)
+                if float(score) < threshold:
+                    num_false_reject += 1
+            num_false_alarm = 0
+            # transverse the all filler_table
+            for key, score_list in filler_table.items():
+                i = 0
+                while i < len(score_list):
+                    if score_list[i] >= threshold:
+                        num_false_alarm += 1
+                        i += window_shift
+                    else:
+                        i += 1
+            if len(keyword_table) != 0:
+                false_reject_rate = num_false_reject / len(keyword_table)
+            num_false_alarm = max(num_false_alarm, 1e-6)
+            if filler_duration != 0:
+                false_alarm_per_hour = num_false_alarm / \
+                    (filler_duration / 3600.0)
+            fout.write('{:.6f} {:.6f} {:.6f}\n'.format(
+                threshold, false_alarm_per_hour, false_reject_rate))
+            threshold += args.step
+            pbar.update(1)
+
+    pbar.close()
+    print('DET saved to: {}'.format(args.stats_file))
diff --git a/paddlespeech/kws/exps/mdtc/plot_det_curve.py b/paddlespeech/kws/exps/mdtc/plot_det_curve.py
new file mode 100644
index 00000000..7986574f
--- /dev/null
+++ b/paddlespeech/kws/exps/mdtc/plot_det_curve.py
@@ -0,0 +1,63 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import sys
+
+import matplotlib.pyplot as plt
+import numpy as np
+
+
+def load_stats_file(stats_file):
+    values = []
+    with open(stats_file, 'r', encoding='utf8') as fin:
+        for line in fin:
+            arr = line.strip().split()
+            threshold, fa_per_hour, frr = arr
+            values.append([float(fa_per_hour), float(frr) * 100])
+    values.reverse()
+    return np.array(values)
+
+
+def plot_det_curve(keywords, stats_dir, figure_file, xlim, x_step, ylim,
+                   y_step):
+    plt.figure(dpi=200)
+    plt.rcParams['xtick.direction'] = 'in'
+    plt.rcParams['ytick.direction'] = 'in'
+    plt.rcParams['font.size'] = 12
+
+    for index, keyword in enumerate(keywords):
+        stats_file = os.path.join(stats_dir, 'stats.' + str(index) + '.txt')
+        values = load_stats_file(stats_file)
+        plt.plot(values[:, 0], values[:, 1], label=keyword)
+
+    plt.xlim([0, xlim])
+    plt.ylim([0, ylim])
+    plt.xticks(range(0, xlim + x_step, x_step))
+    plt.yticks(range(0, ylim + y_step, y_step))
+    plt.xlabel('False Alarm Per Hour')
+    plt.ylabel('False Rejection Rate (\\%)')
+    plt.grid(linestyle='--')
+    plt.legend(loc='best', fontsize=16)
+    plt.savefig(figure_file)
+
+
+if __name__ == '__main__':
+
+    keywords = ['Hey_Snips']
+    img_path = os.path.join(os.path.abspath(sys.argv[1]), 'det.png')
+
+    plot_det_curve(keywords,
+                   os.path.abspath(sys.argv[1]), img_path, 10, 2, 10, 2)
+
+    print('DET curve image saved to: {}'.format(img_path))
diff --git a/paddlespeech/kws/exps/mdtc/score.py b/paddlespeech/kws/exps/mdtc/score.py
new file mode 100644
index 00000000..9fdbcf49
--- /dev/null
+++ b/paddlespeech/kws/exps/mdtc/score.py
@@ -0,0 +1,103 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import sys
+import time
+
+import paddle
+from mdtc import KWSModel
+from mdtc import MDTC
+from tqdm import tqdm
+
+from paddleaudio.datasets import HeySnips
+
+
+def collate_features(batch):
+    # (key, feat, label) in one sample
+    collate_start = time.time()
+    keys = []
+    feats = []
+    labels = []
+    lengths = []
+    for sample in batch:
+        keys.append(sample[0])
+        feats.append(sample[1])
+        labels.append(sample[2])
+        lengths.append(sample[1].shape[0])
+
+    max_length = max(lengths)
+    for i in range(len(feats)):
+        feats[i] = paddle.nn.functional.pad(
+            feats[i], [0, max_length - feats[i].shape[0], 0, 0],
+            data_format='NLC')
+
+    return keys, paddle.stack(feats), paddle.to_tensor(
+        labels), paddle.to_tensor(lengths)
+
+
+if __name__ == '__main__':
+    # Dataset
+    feat_conf = {
+        # 'n_mfcc': 80,
+        'n_mels': 80,
+        'frame_shift': 10,
+        'frame_length': 25,
+        # 'dither': 1.0,
+    }
+    test_ds = HeySnips(
+        mode='test', feat_type='kaldi_fbank', sample_rate=16000, **feat_conf)
+    test_sampler = paddle.io.BatchSampler(
+        test_ds, batch_size=32, drop_last=False)
+    test_loader = paddle.io.DataLoader(
+        test_ds,
+        batch_sampler=test_sampler,
+        num_workers=16,
+        return_list=True,
+        use_buffer_reader=True,
+        collate_fn=collate_features, )
+
+    # Model
+    backbone = MDTC(
+        stack_num=3,
+        stack_size=4,
+        in_channels=80,
+        res_channels=32,
+        kernel_size=5,
+        causal=True, )
+    model = KWSModel(backbone=backbone, num_keywords=1)
+    model = paddle.DataParallel(model)
+    # kws_checkpoint = '/ssd3/chenxiaojie06/PaddleSpeech/DeepSpeech/paddlespeech/kws/models/checkpoint/epoch_10_0.8903940343290826/model.pdparams'
+    kws_checkpoint = os.path.join(
+        os.path.abspath(sys.argv[1]), 'model.pdparams')
+    model.set_state_dict(paddle.load(kws_checkpoint))
+    model.eval()
+
+    score_abs_path = os.path.join(os.path.abspath(sys.argv[1]), 'score.txt')
+    with paddle.no_grad(), open(score_abs_path, 'w', encoding='utf8') as fout:
+        for batch_idx, batch in enumerate(
+                tqdm(test_loader, total=len(test_loader))):
+            keys, feats, labels, lengths = batch
+            logits = model(feats)
+            num_keywords = logits.shape[2]
+            for i in range(len(keys)):
+                key = keys[i]
+                score = logits[i][:lengths[i]]
+                for keyword_i in range(num_keywords):
+                    keyword_scores = score[:, keyword_i]
+                    score_frames = ' '.join(
+                        ['{:.6f}'.format(x) for x in keyword_scores.tolist()])
+                    fout.write(
+                        '{} {} {}\n'.format(key, keyword_i, score_frames))
+
+    print('Scores saved to: {}'.format(score_abs_path))
diff --git a/paddlespeech/kws/exps/mdtc/train.py b/paddlespeech/kws/exps/mdtc/train.py
new file mode 100644
index 00000000..17a9acfc
--- /dev/null
+++ b/paddlespeech/kws/exps/mdtc/train.py
@@ -0,0 +1,205 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+import time
+
+import paddle
+from loss import max_pooling_loss
+from mdtc import KWSModel
+from mdtc import MDTC
+
+from paddleaudio.datasets import HeySnips
+from paddleaudio.utils import logger
+from paddleaudio.utils import Timer
+
+
+def collate_features(batch):
+    # (key, feat, label)
+    collate_start = time.time()
+    keys = []
+    feats = []
+    labels = []
+    lengths = []
+    for sample in batch:
+        keys.append(sample[0])
+        feats.append(sample[1])
+        labels.append(sample[2])
+        lengths.append(sample[1].shape[0])
+
+    max_length = max(lengths)
+    for i in range(len(feats)):
+        feats[i] = paddle.nn.functional.pad(
+            feats[i], [0, max_length - feats[i].shape[0], 0, 0],
+            data_format='NLC')
+
+    return keys, paddle.stack(feats), paddle.to_tensor(
+        labels), paddle.to_tensor(lengths)
+
+
+if __name__ == '__main__':
+    # Dataset
+    feat_conf = {
+        # 'n_mfcc': 80,
+        'n_mels': 80,
+        'frame_shift': 10,
+        'frame_length': 25,
+        # 'dither': 1.0,
+    }
+    data_dir = '/ssd1/chenxiaojie06/datasets/hey_snips/hey_snips_research_6k_en_train_eval_clean_ter'
+    train_ds = HeySnips(
+        data_dir=data_dir,
+        mode='train',
+        feat_type='kaldi_fbank',
+        sample_rate=16000,
+        **feat_conf)
+    dev_ds = HeySnips(
+        data_dir=data_dir,
+        mode='dev',
+        feat_type='kaldi_fbank',
+        sample_rate=16000,
+        **feat_conf)
+
+    training_conf = {
+        'epochs': 100,
+        'learning_rate': 0.001,
+        'weight_decay': 0.00005,
+        'num_workers': 16,
+        'batch_size': 100,
+        'checkpoint_dir': './checkpoint',
+        'save_freq': 10,
+        'log_freq': 10,
+    }
+
+    train_sampler = paddle.io.BatchSampler(
+        train_ds,
+        batch_size=training_conf['batch_size'],
+        shuffle=True,
+        drop_last=False)
+    train_loader = paddle.io.DataLoader(
+        train_ds,
+        batch_sampler=train_sampler,
+        num_workers=training_conf['num_workers'],
+        return_list=True,
+        use_buffer_reader=True,
+        collate_fn=collate_features, )
+
+    # Model
+    backbone = MDTC(
+        stack_num=3,
+        stack_size=4,
+        in_channels=80,
+        res_channels=32,
+        kernel_size=5,
+        causal=True, )
+    model = KWSModel(backbone=backbone, num_keywords=1)
+    model = paddle.DataParallel(model)
+    clip = paddle.nn.ClipGradByGlobalNorm(5.0)
+    optimizer = paddle.optimizer.Adam(
+        learning_rate=training_conf['learning_rate'],
+        weight_decay=training_conf['weight_decay'],
+        parameters=model.parameters(),
+        grad_clip=clip)
+    criterion = max_pooling_loss
+
+    steps_per_epoch = len(train_sampler)
+    timer = Timer(steps_per_epoch * training_conf['epochs'])
+    timer.start()
+
+    for epoch in range(1, training_conf['epochs'] + 1):
+        model.train()
+
+        avg_loss = 0
+        num_corrects = 0
+        num_samples = 0
+        batch_start = time.time()
+        for batch_idx, batch in enumerate(train_loader):
+            # print('Fetch one batch: {:.4f}'.format(time.time()-batch_start))
+            keys, feats, labels, lengths = batch
+            logits = model(feats)
+            loss, corrects, acc = criterion(logits, labels, lengths)
+            loss.backward()
+            optimizer.step()
+            if isinstance(optimizer._learning_rate,
+                          paddle.optimizer.lr.LRScheduler):
+                optimizer._learning_rate.step()
+            optimizer.clear_grad()
+
+            # Calculate loss
+            avg_loss += loss.numpy()[0]
+
+            # Calculate metrics
+            num_corrects += corrects
+            num_samples += feats.shape[0]
+
+            timer.count()
+
+            if (batch_idx + 1) % training_conf['log_freq'] == 0:
+                lr = optimizer.get_lr()
+                avg_loss /= training_conf['log_freq']
+                avg_acc = num_corrects / num_samples
+
+                print_msg = 'Epoch={}/{}, Step={}/{}'.format(
+                    epoch, training_conf['epochs'], batch_idx + 1,
+                    steps_per_epoch)
+                print_msg += ' loss={:.4f}'.format(avg_loss)
+                print_msg += ' acc={:.4f}'.format(avg_acc)
+                print_msg += ' lr={:.6f} step/sec={:.2f} | ETA {}'.format(
+                    lr, timer.timing, timer.eta)
+                logger.train(print_msg)
+
+                avg_loss = 0
+                num_corrects = 0
+                num_samples = 0
+            batch_start = time.time()
+
+        if epoch % training_conf[
+                'save_freq'] == 0 and batch_idx + 1 == steps_per_epoch:
+            dev_sampler = paddle.io.BatchSampler(
+                dev_ds,
+                batch_size=training_conf['batch_size'],
+                shuffle=False,
+                drop_last=False)
+            dev_loader = paddle.io.DataLoader(
+                dev_ds,
+                batch_sampler=dev_sampler,
+                num_workers=training_conf['num_workers'],
+                return_list=True,
+                use_buffer_reader=True,
+                collate_fn=collate_features, )
+
+            model.eval()
+            num_corrects = 0
+            num_samples = 0
+            with logger.processing('Evaluation on validation dataset'):
+                for batch_idx, batch in enumerate(dev_loader):
+                    keys, feats, labels, lengths = batch
+                    logits = model(feats)
+                    loss, corrects, acc = criterion(logits, labels, lengths)
+                    num_corrects += corrects
+                    num_samples += feats.shape[0]
+
+            eval_acc = num_corrects / num_samples
+            print_msg = '[Evaluation result]'
+            print_msg += ' dev_acc={:.4f}'.format(eval_acc)
+
+            logger.eval(print_msg)
+
+            # Save model
+            save_dir = os.path.join(training_conf['checkpoint_dir'],
+                                    'epoch_{}_{:.4f}'.format(epoch, eval_acc))
+            logger.info('Saving model checkpoint to {}'.format(save_dir))
+            paddle.save(model.state_dict(),
+                        os.path.join(save_dir, 'model.pdparams'))
+            paddle.save(optimizer.state_dict(),
+                        os.path.join(save_dir, 'model.pdopt'))