diff --git a/paddleslim/quant/quant_embedding.py b/paddleslim/quant/quant_embedding.py
index 7090ea0a307c5c100ad8b1e9d85aa05baf7e5eaf..c49b6762b1844026e0d6dfaaab2a36108fe2c7cd 100755
--- a/paddleslim/quant/quant_embedding.py
+++ b/paddleslim/quant/quant_embedding.py
@@ -70,7 +70,7 @@ def _merge_config(old_config, new_config):
             supported, now supported dtypes are {} \
                 ".format(dtype, support_dtype)
     if 'threshold' in keys:
-        assert isinstance(new_config['threshold'], (float, int)), "threshold \
+        assert isinstance(old_config['threshold'], (float, int)), "threshold \
                 must be number."
 
     print("quant_embedding config {}".format(old_config))