diff --git a/components/button/style/index.less b/components/button/style/index.less
index 4c22fa7877..41b888a4ff 100644
--- a/components/button/style/index.less
+++ b/components/button/style/index.less
@@ -16,6 +16,10 @@
     .@{btn-prefix-cls}-group &:not(:first-child):not(:last-child) {
       border-right-color: @btn-group-border;
       border-left-color: @btn-group-border;
+
+      &:disabled {
+        border-color: @btn-default-border;
+      }
     }
 
     .@{btn-prefix-cls}-group &:first-child {
@@ -28,7 +32,7 @@
     }
 
     .@{btn-prefix-cls}-group &:last-child:not(:first-child),
-    .@{btn-prefix-cls}-group & + .@{btn-prefix-cls} {
+    .@{btn-prefix-cls}-group & + & {
       border-left-color: @btn-group-border;
       &[disabled] {
         border-left-color: @btn-default-border;
diff --git a/components/button/style/mixin.less b/components/button/style/mixin.less
index 72fcfc5cef..942019e23c 100644
--- a/components/button/style/mixin.less
+++ b/components/button/style/mixin.less
@@ -76,12 +76,18 @@
   display: inline-block;
   > .@{btnClassName} {
     position: relative;
+    z-index: 1;
+
     &:hover,
     &:focus,
     &:active,
     &.active {
       z-index: 2;
     }
+
+    &:disabled {
+      z-index: 0;
+    }
   }
 
   // size