diff --git a/agent/component/invoke.py b/agent/component/invoke.py
index a4aa98191..cb313925b 100644
--- a/agent/component/invoke.py
+++ b/agent/component/invoke.py
@@ -57,7 +57,7 @@ class Invoke(ComponentBase, ABC):
     def _invoke(self, **kwargs):
         args = {}
         for para in self._param.variables:
-            if para.get("value") is not None:
+            if para.get("value"):
                 args[para["key"]] = para["value"]
             else:
                 args[para["key"]] = self._canvas.get_variable_value(para["ref"])
@@ -139,4 +139,4 @@ class Invoke(ComponentBase, ABC):
         assert False, self.output()
 
     def thoughts(self) -> str:
-        return "Waiting for the server respond..."
\ No newline at end of file
+        return "Waiting for the server respond..."