diff --git a/paddlespeech/server/conf/application.yaml b/paddlespeech/server/conf/application.yaml
index 8650154e..55f241ec 100644
--- a/paddlespeech/server/conf/application.yaml
+++ b/paddlespeech/server/conf/application.yaml
@@ -25,6 +25,7 @@ asr_python:
     cfg_path: # [optional]
     ckpt_path: # [optional]
     decode_method: 'attention_rescoring'
+    num_decoding_left_chunks: -1
     force_yes: True
     device:  # set 'gpu:id' or 'cpu'
 
@@ -38,6 +39,7 @@ asr_inference:
     lang: 'zh'
     sample_rate: 16000
     cfg_path: 
+    num_decoding_left_chunks: -1
     decode_method: 
     force_yes: True
 
diff --git a/paddlespeech/server/engine/asr/python/asr_engine.py b/paddlespeech/server/engine/asr/python/asr_engine.py
index 02c40fd1..9ce05d97 100644
--- a/paddlespeech/server/engine/asr/python/asr_engine.py
+++ b/paddlespeech/server/engine/asr/python/asr_engine.py
@@ -66,11 +66,12 @@ class ASREngine(BaseEngine):
             )
             logger.error(e)
             return False
-
+        
         self.executor._init_from_path(
-            self.config.model, self.config.lang, self.config.sample_rate,
-            self.config.cfg_path, self.config.decode_method,
-            self.config.ckpt_path)
+            model_type = self.config.model, lang = self.config.lang, sample_rate = self.config.sample_rate,
+            cfg_path = self.config.cfg_path, decode_method = self.config.decode_method,
+            ckpt_path = self.config.ckpt_path)
+
 
         logger.info("Initialize ASR server engine successfully on device: %s." %
                     (self.device))