diff --git a/frontend/src/pages/Workflow/Definition/Design/index.less b/frontend/src/pages/Workflow/Definition/Design/index.less
index 1c16e515..ab5da4e6 100644
--- a/frontend/src/pages/Workflow/Definition/Design/index.less
+++ b/frontend/src/pages/Workflow/Definition/Design/index.less
@@ -1,5 +1,6 @@
 .workflow-design {
-    height: 100%;
+    position: relative;
+    height: calc(100vh - 184px); // 120px + 24px * 2 + 16px
     display: flex;
     flex-direction: column;
     background: #fff;