diff --git a/python/paddle_serving_client/__init__.py b/python/paddle_serving_client/__init__.py
index 03fae970b8163be0a02478c9248637f4ce53fca9..b0bfcbeb993009320a57a3284b46f196d8800ac1 100644
--- a/python/paddle_serving_client/__init__.py
+++ b/python/paddle_serving_client/__init__.py
@@ -109,12 +109,19 @@ class Client(object):
         self.fetch_names_to_type_ = {}
         self.fetch_names_to_idx_ = {}
         self.lod_tensor_set = set()
+        self.feed_tensor_len = {}
         for i, var in enumerate(model_conf.feed_var):
             self.feed_names_to_idx_[var.alias_name] = i
             self.feed_types_[var.alias_name] = var.feed_type
             self.feed_shapes_[var.alias_name] = var.shape
+
             if var.is_lod_tensor:
                 self.lod_tensor_set.add(var.alias_name)
+            else:
+                counter = 1
+                for dim in self.feed_shapes_[var.alias_name]:
+                    counter *= dim
+                self.feed_tensor_len[var.alias_name] = counter
 
         for i, var in enumerate(model_conf.fetch_var):
             self.fetch_names_to_idx_[var.alias_name] = i
@@ -143,9 +150,7 @@ class Client(object):
         seq_shape = 1
         if key in self.lod_tensor_set:
             return
-        for shape in self.feed_shapes_[key]:
-            seq_shape *= shape
-        if len(feed[key]) != seq_shape:
+        if len(feed[key]) != self.feed_tensor_len[key]:
             raise SystemExit("The shape of feed tensor {} not match.".format(
                 key))