diff --git a/demos/streaming_asr_server/conf/ws_conformer_talcs_application.yaml b/demos/streaming_asr_server/conf/ws_conformer_talcs_application.yaml
new file mode 100644
index 000000000..bdeadd5e9
--- /dev/null
+++ b/demos/streaming_asr_server/conf/ws_conformer_talcs_application.yaml
@@ -0,0 +1,50 @@
+# This is the parameter configuration file for PaddleSpeech Serving.
+
+#################################################################################
+#                             SERVER SETTING                                    #
+#################################################################################
+host: 0.0.0.0
+port: 8090
+
+# The task format in the engin_list is: <speech task>_<engine type>
+# task choices = ['asr_online']
+# protocol = ['websocket'] (only one can be selected).
+# websocket only support online engine type.
+protocol: 'websocket'
+engine_list: ['asr_online']
+
+
+#################################################################################
+#                                ENGINE CONFIG                                  #
+#################################################################################
+
+################################### ASR #########################################
+################### speech task: asr; engine_type: online #######################
+asr_online:
+    model_type: 'conformer_online_talcs'
+    am_model: # the pdmodel file of am static model [optional]
+    am_params:  # the pdiparams file of am static model [optional]
+    codeswitch: True
+    lang: 'zh_en'
+    sample_rate: 16000
+    cfg_path: 
+    decode_method: 
+    num_decoding_left_chunks: -1
+    force_yes: True
+    device: 'cpu' # cpu or gpu:id
+    decode_method: "attention_rescoring"
+    continuous_decoding: True # enable continue decoding when endpoint detected
+
+    am_predictor_conf:
+        device:  # set 'gpu:id' or 'cpu'
+        switch_ir_optim: True
+        glog_info: False  # True -> print glog
+        summary: True  # False -> do not show predictor config
+
+    chunk_buffer_conf:
+        window_n: 7     # frame
+        shift_n: 4      # frame
+        window_ms: 25   # ms
+        shift_ms: 10    # ms
+        sample_rate: 16000
+        sample_width: 2
diff --git a/paddlespeech/resource/pretrained_models.py b/paddlespeech/resource/pretrained_models.py
index 64ef44481..9b8c4d2b5 100644
--- a/paddlespeech/resource/pretrained_models.py
+++ b/paddlespeech/resource/pretrained_models.py
@@ -407,6 +407,22 @@ asr_dynamic_pretrained_models = {
             'exp/conformer/checkpoints/avg_10'
         },
     },
+    "conformer_online_talcs-codeswitch_zh_en-16k": {
+        '1.6': {
+            'url':
+            'https://paddlespeech.bj.bcebos.com/s2t/tal_cs/asr1/asr1_chunk_conformer_talcs_ckpt_1.6.0.model.tar.gz',
+            'md5':
+            '3132daf1004fd76c185e14b7f0af01f9',
+            'cfg_path':
+            'model.yaml',
+            'model':
+            'exp/chunk_conformer/checkpoints/avg_10.pdparams',
+            'params':
+            'exp/chunk_conformer/checkpoints/avg_10.pdparams',
+            'ckpt_path':
+            'exp/chunk_conformer/checkpoints/avg_10',
+        },
+    },
 }
 
 asr_static_pretrained_models = {
diff --git a/paddlespeech/server/engine/asr/online/python/asr_engine.py b/paddlespeech/server/engine/asr/online/python/asr_engine.py
index a702f0aa1..f9ce0eee9 100644
--- a/paddlespeech/server/engine/asr/online/python/asr_engine.py
+++ b/paddlespeech/server/engine/asr/online/python/asr_engine.py
@@ -772,6 +772,7 @@ class ASRServerExecutor(ASRExecutor):
                         am_model: Optional[os.PathLike]=None,
                         am_params: Optional[os.PathLike]=None,
                         lang: str='zh',
+                        codeswitch: Optional[bool]=False,
                         sample_rate: int=16000,
                         cfg_path: Optional[os.PathLike]=None,
                         decode_method: str='attention_rescoring',
@@ -795,7 +796,12 @@ class ASRServerExecutor(ASRExecutor):
         logger.debug(f"model_type: {self.model_type}")
 
         sample_rate_str = '16k' if sample_rate == 16000 else '8k'
-        tag = model_type + '-' + lang + '-' + sample_rate_str
+        if lang == "zh_en" and codeswitch is True:
+            tag = model_type + '-' + 'codeswitch_' + lang + '-' + sample_rate_str
+        elif lang == "zh_en" or codeswitch is True:
+            raise Exception("codeswitch is true only in zh_en model")
+        else:
+            tag = model_type + '-' + lang + '-' + sample_rate_str
         self.task_resource.set_task_model(model_tag=tag)
 
         if cfg_path is None or am_model is None or am_params is None:
@@ -862,6 +868,7 @@ class ASREngine(BaseEngine):
                 am_model=self.config.am_model,
                 am_params=self.config.am_params,
                 lang=self.config.lang,
+                codeswitch=self.config.get("codeswitch", False),
                 sample_rate=self.config.sample_rate,
                 cfg_path=self.config.cfg_path,
                 decode_method=self.config.decode_method,