diff --git a/apps/application/flow/step_node/condition_node/compare/__init__.py b/apps/application/flow/step_node/condition_node/compare/__init__.py
index b2c464b41..0f61962fb 100644
--- a/apps/application/flow/step_node/condition_node/compare/__init__.py
+++ b/apps/application/flow/step_node/condition_node/compare/__init__.py
@@ -18,6 +18,10 @@ from .len_gt_compare import *
 from .len_le_compare import *
 from .len_lt_compare import *
 from .len_equal_compare import *
+from .is_not_null_compare import *
+from .is_null_compare import *
 
 compare_handle_list = [GECompare(), GTCompare(), ContainCompare(), EqualCompare(), LTCompare(), LECompare(),
-                       LenLECompare(), LenGECompare(), LenEqualCompare(), LenGTCompare(), LenLTCompare()]
+                       LenLECompare(), LenGECompare(), LenEqualCompare(), LenGTCompare(), LenLTCompare(),
+                       IsNullCompare(),
+                       IsNotNullCompare()]
diff --git a/apps/application/flow/step_node/condition_node/compare/is_not_null_compare.py b/apps/application/flow/step_node/condition_node/compare/is_not_null_compare.py
index 9c281e381..5dec26713 100644
--- a/apps/application/flow/step_node/condition_node/compare/is_not_null_compare.py
+++ b/apps/application/flow/step_node/condition_node/compare/is_not_null_compare.py
@@ -17,5 +17,5 @@ class IsNotNullCompare(Compare):
         if compare == 'is_not_null':
             return True
 
-    def compare(self, source_value, compare, target_value=None):
-        return source_value is not None
+    def compare(self, source_value, compare, target_value):
+        return source_value is not None and len(source_value) > 0
diff --git a/apps/application/flow/step_node/condition_node/compare/is_null_compare.py b/apps/application/flow/step_node/condition_node/compare/is_null_compare.py
index 6d49de605..c463f3fda 100644
--- a/apps/application/flow/step_node/condition_node/compare/is_null_compare.py
+++ b/apps/application/flow/step_node/condition_node/compare/is_null_compare.py
@@ -17,5 +17,5 @@ class IsNullCompare(Compare):
         if compare == 'is_null':
             return True
 
-    def compare(self, source_value, compare, target_value=None):
-        return source_value is None
+    def compare(self, source_value, compare, target_value):
+        return source_value is None or len(source_value) == 0