diff --git a/paddlespeech/s2t/utils/utility.py b/paddlespeech/s2t/utils/utility.py
index fe2fa9167..d7e7c6ca2 100644
--- a/paddlespeech/s2t/utils/utility.py
+++ b/paddlespeech/s2t/utils/utility.py
@@ -131,8 +131,7 @@ def get_subsample(config):
         int: subsample rate.
     """
     if config['encoder'] == 'squeezeformer':
-        input_layer = config["encoder_conf"]["time_reduction_layer_type"]
-        assert input_layer in ["conv2d", "conv1d", "stream"]
+        return 4
     else:
         input_layer = config["encoder_conf"]["input_layer"]
         assert input_layer in ["conv2d", "conv2d6", "conv2d8"]
@@ -142,7 +141,3 @@ def get_subsample(config):
         return 6
     elif input_layer == "conv2d8":
         return 8
-    elif input_layer == "conv1d":
-        return 6
-    elif input_layer == "stream":
-        return 8