diff --git a/speechx/examples/ds2_ol/onnx/local/onnx_prune_model.py b/speechx/examples/ds2_ol/onnx/local/onnx_prune_model.py
new file mode 100644
index 000000000..a5148edda
--- /dev/null
+++ b/speechx/examples/ds2_ol/onnx/local/onnx_prune_model.py
@@ -0,0 +1,127 @@
+#!/usr/bin/env python3 -W ignore::DeprecationWarning
+import argparse
+import copy
+import sys
+
+import onnx
+
+
+def parse_arguments():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        '--model',
+        required=True,
+        help='Path of directory saved the input model.')
+    parser.add_argument(
+        '--output_names',
+        required=True,
+        nargs='+',
+        help='The outputs of pruned model.')
+    parser.add_argument(
+        '--save_file', required=True, help='Path to save the new onnx model.')
+    return parser.parse_args()
+
+
+if __name__ == '__main__':
+    args = parse_arguments()
+
+    if len(set(args.output_names)) < len(args.output_names):
+        print(
+            "[ERROR] There's dumplicate name in --output_names, which is not allowed."
+        )
+        sys.exit(-1)
+
+    model = onnx.load(args.model)
+
+    # collect all node outputs and graph output
+    output_tensor_names = set()
+    for node in model.graph.node:
+        for out in node.output:
+            # may contain model output
+            output_tensor_names.add(out)
+
+    # for out in model.graph.output:
+    #     output_tensor_names.add(out.name)
+
+    for output_name in args.output_names:
+        if output_name not in output_tensor_names:
+            print(
+                "[ERROR] Cannot find output tensor name '{}' in onnx model graph.".
+                format(output_name))
+            sys.exit(-1)
+
+    output_node_indices = set()  # has output names
+    output_to_node = dict()  # all node outputs
+    for i, node in enumerate(model.graph.node):
+        for out in node.output:
+            output_to_node[out] = i
+            if out in args.output_names:
+                output_node_indices.add(i)
+
+    # from outputs find all the ancestors
+    reserved_node_indices = copy.deepcopy(
+        output_node_indices)  # nodes need to keep
+    reserved_inputs = set()  # model input to keep
+    new_output_node_indices = copy.deepcopy(output_node_indices)
+
+    while True and len(new_output_node_indices) > 0:
+        output_node_indices = copy.deepcopy(new_output_node_indices)
+
+        new_output_node_indices = set()
+
+        for out_node_idx in output_node_indices:
+            # backtrace to parenet
+            for ipt in model.graph.node[out_node_idx].input:
+                if ipt in output_to_node:
+                    reserved_node_indices.add(output_to_node[ipt])
+                    new_output_node_indices.add(output_to_node[ipt])
+                else:
+                    reserved_inputs.add(ipt)
+
+    num_inputs = len(model.graph.input)
+    num_outputs = len(model.graph.output)
+    num_nodes = len(model.graph.node)
+    print(
+        f"old graph has {num_inputs} inputs, {num_outputs} outpus, {num_nodes} nodes"
+    )
+    print(f"{len(reserved_node_indices)} node to keep.")
+
+    # del node not to keep
+    for idx in range(num_nodes - 1, -1, -1):
+        if idx not in reserved_node_indices:
+            del model.graph.node[idx]
+
+    # del graph input not to keep
+    for idx in range(num_inputs - 1, -1, -1):
+        if model.graph.input[idx].name not in reserved_inputs:
+            del model.graph.input[idx]
+
+    # del old graph outputs
+    for i in range(num_outputs):
+        del model.graph.output[0]
+
+    # new graph output as user input
+    for out in args.output_names:
+        model.graph.output.extend([onnx.ValueInfoProto(name=out)])
+
+    # infer shape
+    try:
+        from onnx_infer_shape import SymbolicShapeInference
+        model = SymbolicShapeInference.infer_shapes(
+            model,
+            int_max=2**31 - 1,
+            auto_merge=True,
+            guess_output_rank=False,
+            verbose=1)
+    except Exception as e:
+        print(f"skip infer shape step: {e}")
+
+    # check onnx model
+    onnx.checker.check_model(model)
+    # save onnx model
+    onnx.save(model, args.save_file)
+    print("[Finished] The new model saved in {}.".format(args.save_file))
+    print("[DEBUG INFO] The inputs of new model: {}".format(
+        [x.name for x in model.graph.input]))
+    print("[DEBUG INFO] The outputs of new model: {}".format(
+        [x.name for x in model.graph.output]))
diff --git a/speechx/examples/ds2_ol/onnx/local/onnx_rename_model.py b/speechx/examples/ds2_ol/onnx/local/onnx_rename_model.py
new file mode 100755
index 000000000..f508c0a35
--- /dev/null
+++ b/speechx/examples/ds2_ol/onnx/local/onnx_rename_model.py
@@ -0,0 +1,110 @@
+#!/usr/bin/env python3 -W ignore::DeprecationWarning
+import argparse
+import sys
+
+import onnx
+
+
+def parse_arguments():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        '--model',
+        required=True,
+        help='Path of directory saved the input model.')
+    parser.add_argument(
+        '--origin_names',
+        required=True,
+        nargs='+',
+        help='The original name you want to modify.')
+    parser.add_argument(
+        '--new_names',
+        required=True,
+        nargs='+',
+        help='The new name you want change to, the number of new_names should be same with the number of origin_names'
+    )
+    parser.add_argument(
+        '--save_file', required=True, help='Path to save the new onnx model.')
+    return parser.parse_args()
+
+
+if __name__ == '__main__':
+    args = parse_arguments()
+
+    if len(set(args.origin_names)) < len(args.origin_names):
+        print(
+            "[ERROR] There's dumplicate name in --origin_names, which is not allowed."
+        )
+        sys.exit(-1)
+
+    if len(set(args.new_names)) < len(args.new_names):
+        print(
+            "[ERROR] There's dumplicate name in --new_names, which is not allowed."
+        )
+        sys.exit(-1)
+
+    if len(args.new_names) != len(args.origin_names):
+        print(
+            "[ERROR] Number of --new_names must be same with the number of --origin_names."
+        )
+        sys.exit(-1)
+
+    model = onnx.load(args.model)
+
+    # collect input and all node output
+    output_tensor_names = set()
+    for ipt in model.graph.input:
+        output_tensor_names.add(ipt.name)
+
+    for node in model.graph.node:
+        for out in node.output:
+            output_tensor_names.add(out)
+
+    for origin_name in args.origin_names:
+        if origin_name not in output_tensor_names:
+            print(
+                f"[ERROR] Cannot find tensor name '{origin_name}' in onnx model graph."
+            )
+            sys.exit(-1)
+
+    for new_name in args.new_names:
+        if new_name in output_tensor_names:
+            print(
+                "[ERROR] The defined new_name '{}' is already exist in the onnx model, which is not allowed."
+            )
+            sys.exit(-1)
+
+    # rename graph input
+    for i, ipt in enumerate(model.graph.input):
+        if ipt.name in args.origin_names:
+            idx = args.origin_names.index(ipt.name)
+            model.graph.input[i].name = args.new_names[idx]
+
+    # rename node input and output
+    for i, node in enumerate(model.graph.node):
+        for j, ipt in enumerate(node.input):
+            if ipt in args.origin_names:
+                idx = args.origin_names.index(ipt)
+                model.graph.node[i].input[j] = args.new_names[idx]
+
+        for j, out in enumerate(node.output):
+            if out in args.origin_names:
+                idx = args.origin_names.index(out)
+                model.graph.node[i].output[j] = args.new_names[idx]
+
+    # rename graph output
+    for i, out in enumerate(model.graph.output):
+        if out.name in args.origin_names:
+            idx = args.origin_names.index(out.name)
+            model.graph.output[i].name = args.new_names[idx]
+
+    # check onnx model
+    onnx.checker.check_model(model)
+
+    # save model
+    onnx.save(model, args.save_file)
+
+    print("[Finished] The new model saved in {}.".format(args.save_file))
+    print("[DEBUG INFO] The inputs of new model: {}".format(
+        [x.name for x in model.graph.input]))
+    print("[DEBUG INFO] The outputs of new model: {}".format(
+        [x.name for x in model.graph.output]))
diff --git a/speechx/examples/ds2_ol/onnx/local/pd_infer_shape.py b/speechx/examples/ds2_ol/onnx/local/pd_infer_shape.py
old mode 100644
new mode 100755
diff --git a/speechx/examples/ds2_ol/onnx/local/prune.sh b/speechx/examples/ds2_ol/onnx/local/prune.sh
index ee5f6b5f2..64636bccf 100755
--- a/speechx/examples/ds2_ol/onnx/local/prune.sh
+++ b/speechx/examples/ds2_ol/onnx/local/prune.sh
@@ -3,6 +3,7 @@
 set -e
 
 if [ $# != 5 ]; then
+    # local/prune.sh data/exp/deepspeech2_online/checkpoints avg_1.jit.pdmodel avg_1.jit.pdiparams  softmax_0.tmp_0,tmp_5,concat_0.tmp_0,concat_1.tmp_0  $PWD                                                 
     echo "usage: $0 model_dir model_filename param_filename outputs_names save_dir"
     exit 1
 fi
diff --git a/speechx/examples/ds2_ol/onnx/local/tonnx.sh b/speechx/examples/ds2_ol/onnx/local/tonnx.sh
index a57b84f61..58f0d736b 100755
--- a/speechx/examples/ds2_ol/onnx/local/tonnx.sh
+++ b/speechx/examples/ds2_ol/onnx/local/tonnx.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 if [ $# != 4 ];then
+    # local/tonnx.sh data/exp/deepspeech2_online/checkpoints avg_1.jit.pdmodel avg_1.jit.pdiparams exp/model.onnx   
     echo "usage: $0 model_dir model_name param_name onnx_output_name"
     exit 1
 fi
@@ -11,6 +12,7 @@ param=$3
 output=$4
 
 pip install paddle2onnx
+pip install onnx
 
 # https://github.com/PaddlePaddle/Paddle2ONNX#%E5%91%BD%E4%BB%A4%E8%A1%8C%E8%BD%AC%E6%8D%A2
 paddle2onnx --model_dir $dir \
diff --git a/speechx/examples/ds2_ol/onnx/run.sh b/speechx/examples/ds2_ol/onnx/run.sh
index 37d4f7f7a..a9f7681c6 100755
--- a/speechx/examples/ds2_ol/onnx/run.sh
+++ b/speechx/examples/ds2_ol/onnx/run.sh
@@ -10,6 +10,9 @@ stop_stage=100
 . utils/parse_options.sh
 
 data=data
+exp=exp
+
+mkdir -p $data $exp
 
 if [ ${stage} -le 0 ] && [ ${stop_stage} -ge 0 ];then
     test -f $data/asr0_deepspeech2_online_wenetspeech_ckpt_1.0.0a.model.tar.gz || wget -c https://paddlespeech.bj.bcebos.com/s2t/wenetspeech/asr0/asr0_deepspeech2_online_wenetspeech_ckpt_1.0.0a.model.tar.gz -P $data
@@ -25,21 +28,24 @@ param=avg_1.jit.pdiparams
 
 output_names=softmax_0.tmp_0,tmp_5,concat_0.tmp_0,concat_1.tmp_0
 if [ ${stage} -le 1 ] && [ ${stop_stage} -ge 1 ];then
-    mkdir -p $data/prune
+    mkdir -p $exp/prune
 
     # prune model deps on output_names.
-    ./local/prune.sh $dir $model $param  $output_names  $data/prune
+    ./local/prune.sh $dir $model $param  $output_names  $exp/prune
 fi
 
 input_shape_dict="{'audio_chunk':[1,-1,161], 'audio_chunk_lens':[1], 'chunk_state_c_box':[5, 1, 1024], 'chunk_state_h_box':[5,1,1024]}"
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ];then
-    mkdir -p $data/shape
+    mkdir -p $exp/shape
 
     python3 local/pd_infer_shape.py \
         --model_dir $dir \
         --model_filename $model \
         --params_filename $param \
-        --save_dir $data/shape \
+        --save_dir $exp/shape \
         --input_shape_dict=${input_shape_dict} 
 fi
 
+if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ];then
+   ./local/tonnx.sh $dir $model $param $exp/model.onnx
+fi
\ No newline at end of file