diff --git a/paddlespeech/t2s/frontend/g2pw/onnx_api.py b/paddlespeech/t2s/frontend/g2pw/onnx_api.py
index 9628fa635d69b5f68c14c435687e56df3006b4d7..188d973721c5b740ecbcf35a722d055462c08f06 100644
--- a/paddlespeech/t2s/frontend/g2pw/onnx_api.py
+++ b/paddlespeech/t2s/frontend/g2pw/onnx_api.py
@@ -46,8 +46,10 @@ class G2PWOnnxConverter:
             uncompress_path = download_and_decompress(g2pw_onnx_models['G2PWModel']['1.0'],model_dir)
 
         sess_options = onnxruntime.SessionOptions()
+        sess_options.graph_optimization_level = onnxruntime.GraphOptimizationLevel.ORT_ENABLE_ALL
+        sess_options.execution_mode = onnxruntime.ExecutionMode.ORT_SEQUENTIAL
         sess_options.intra_op_num_threads = 2
-        self.session_g2pW =  onnxruntime.InferenceSession(os.path.join(model_dir, 'G2PWModel/g2pW.onnx'))
+        self.session_g2pW =  onnxruntime.InferenceSession(os.path.join(model_dir, 'G2PWModel/g2pW.onnx'),sess_options=sess_options)
         self.config = load_config(os.path.join(model_dir, 'G2PWModel/config.py'), use_default=True)
 
         self.model_source = model_source if model_source else self.config.model_source