diff --git a/deepctr/layers/activation.py b/deepctr/layers/activation.py
index 5e55945f..e5b77938 100644
--- a/deepctr/layers/activation.py
+++ b/deepctr/layers/activation.py
@@ -70,6 +70,8 @@ def activation_layer(activation):
         act_layer = tf.keras.layers.Activation(activation)
     elif issubclass(activation, Layer):
         act_layer = activation()
+    elif isinstance(activation, Layer):
+        act_layer = activation
     else:
         raise ValueError(
             "Invalid activation,found %s.You should use a str or a Activation Layer Class." % (activation))