diff --git a/scss/_mixins.scss b/scss/_mixins.scss
index 98621ad80..9a5796885 100644
--- a/scss/_mixins.scss
+++ b/scss/_mixins.scss
@@ -205,6 +205,7 @@
   height: $height;
 
   .#{$ns}Button-icon:first-child:not(:last-child):not(.pull-right),
+  > svg.icon:not(:last-child):not(.pull-right),
   > .pull-left {
     margin-right: $padding-x;
   }
diff --git a/src/renderers/Form/Combo.tsx b/src/renderers/Form/Combo.tsx
index c02ab3f49..de9530da0 100644
--- a/src/renderers/Form/Combo.tsx
+++ b/src/renderers/Form/Combo.tsx
@@ -772,7 +772,7 @@ export default class ComboControl extends React.Component<ComboProps> {
                     {
                       type: 'dropdown-button',
                       icon: addIcon ? (
-                        <Icon icon="plus" className="icon m-r-xs" />
+                        <Icon icon="plus" className="icon" />
                       ) : (
                         ''
                       ),
@@ -797,9 +797,7 @@ export default class ComboControl extends React.Component<ComboProps> {
                     data-position="left"
                     data-tooltip={__('新增一条数据')}
                   >
-                    {addIcon ? (
-                      <Icon icon="plus" className="icon m-r-xs" />
-                    ) : null}
+                    {addIcon ? <Icon icon="plus" className="icon" /> : null}
                     <span>{__(addButtonText || '新增')}</span>
                   </a>
                 )
@@ -1149,9 +1147,7 @@ export default class ComboControl extends React.Component<ComboProps> {
                   className={cx(`Button Combo-addBtn`, addButtonClassName)}
                   data-tooltip={__('新增一条数据')}
                 >
-                  {addIcon ? (
-                    <Icon icon="plus" className="icon m-r-xs" />
-                  ) : null}
+                  {addIcon ? <Icon icon="plus" className="icon" /> : null}
                   <span>{__(addButtonText || '新增')}</span>
                 </button>
               )
diff --git a/src/renderers/Form/SubForm.tsx b/src/renderers/Form/SubForm.tsx
index 47da93182..cc7e01ed6 100644
--- a/src/renderers/Form/SubForm.tsx
+++ b/src/renderers/Form/SubForm.tsx
@@ -211,7 +211,7 @@ export default class SubFormControl extends React.PureComponent<
         disabled={disabled}
         data-tooltip={__('新增一条数据')}
       >
-        <Icon icon="plus" className="icon m-r-xs" />
+        <Icon icon="plus" className="icon" />
         <span>{__('新增')}</span>
       </button>
     ];