diff --git a/sao/src/sao.less b/sao/src/sao.less
index 37417ddd2d..3bde24d6d3 100644
--- a/sao/src/sao.less
+++ b/sao/src/sao.less
@@ -1612,6 +1612,16 @@ input.column-boolean {
         .form-container, .form-hcontainer, .form-vcontainer {
             display: block;
 
+            // remove fake gap
+            margin-left: 0;
+            > * {
+                padding-left: 0;
+            }
+            > * + * {
+                margin-top: 0;
+                margin-left: 0;
+            }
+
             .form-item {
                 padding: 2px 0;
             }