diff --git a/packages/submit-bar/index.less b/packages/submit-bar/index.less
index 27173814a..2a8b76484 100644
--- a/packages/submit-bar/index.less
+++ b/packages/submit-bar/index.less
@@ -60,7 +60,7 @@
     }
   }
 
-  .van-button {
+  &__button {
     width: 110px;
   }
 
diff --git a/packages/submit-bar/index.tsx b/packages/submit-bar/index.tsx
index ab13ea2ce..1693683ba 100644
--- a/packages/submit-bar/index.tsx
+++ b/packages/submit-bar/index.tsx
@@ -78,6 +78,7 @@ function SubmitBar(
         <Button
           square
           size="large"
+          class={bem('button')}
           type={props.buttonType}
           loading={props.loading}
           disabled={props.disabled}
diff --git a/packages/submit-bar/test/__snapshots__/demo.spec.js.snap b/packages/submit-bar/test/__snapshots__/demo.spec.js.snap
index 6dedd0d37..05e742a70 100644
--- a/packages/submit-bar/test/__snapshots__/demo.spec.js.snap
+++ b/packages/submit-bar/test/__snapshots__/demo.spec.js.snap
@@ -5,7 +5,7 @@ exports[`renders demo correctly 1`] = `
   <div>
     <div class="van-submit-bar">
       <div class="van-submit-bar__bar">
-        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button class="van-button van-button--danger van-button--large van-button--square"><span class="van-button__text">提交订单</span></button>
+        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button class="van-button van-button--danger van-button--large van-button--square van-submit-bar__button"><span class="van-button__text">提交订单</span></button>
       </div>
     </div>
   </div>
@@ -14,14 +14,14 @@ exports[`renders demo correctly 1`] = `
       <div class="van-submit-bar__tip"><i class="van-icon van-icon-info-o van-submit-bar__tip-icon">
           <!----></i><span class="van-submit-bar__tip-text">你的收货地址不支持同城送, 我们已为你推荐快递</span></div>
       <div class="van-submit-bar__bar">
-        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button disabled="disabled" class="van-button van-button--danger van-button--large van-button--disabled van-button--square"><span class="van-button__text">提交订单</span></button>
+        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button disabled="disabled" class="van-button van-button--danger van-button--large van-button--disabled van-button--square van-submit-bar__button"><span class="van-button__text">提交订单</span></button>
       </div>
     </div>
   </div>
   <div>
     <div class="van-submit-bar">
       <div class="van-submit-bar__bar">
-        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button class="van-button van-button--danger van-button--large van-button--loading van-button--square">
+        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button class="van-button van-button--danger van-button--large van-button--loading van-button--square van-submit-bar__button">
           <div class="van-loading van-loading--circular"><span class="van-loading__spinner van-loading__spinner--circular" style="width: 20px; height: 20px;"><svg viewBox="25 25 50 50" class="van-loading__circular"><circle cx="50" cy="50" r="20" fill="none"></circle></svg></span></div>
         </button>
       </div>
@@ -39,7 +39,7 @@ exports[`renders demo correctly 1`] = `
           <div class="van-checkbox__icon van-checkbox__icon--round van-checkbox__icon--checked"><i class="van-icon van-icon-success">
               <!----></i></div><span class="van-checkbox__label">全选</span>
         </div>
-        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button class="van-button van-button--danger van-button--large van-button--square"><span class="van-button__text">提交订单</span></button>
+        <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 30.50</span></div><button class="van-button van-button--danger van-button--large van-button--square van-submit-bar__button"><span class="van-button__text">提交订单</span></button>
       </div>
     </div>
   </div>
diff --git a/packages/submit-bar/test/__snapshots__/index.spec.js.snap b/packages/submit-bar/test/__snapshots__/index.spec.js.snap
index 23aa0e45d..36d1702fc 100644
--- a/packages/submit-bar/test/__snapshots__/index.spec.js.snap
+++ b/packages/submit-bar/test/__snapshots__/index.spec.js.snap
@@ -3,7 +3,7 @@
 exports[`decimal-length prop 1`] = `
 <div class="van-submit-bar">
   <div class="van-submit-bar__bar">
-    <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 1.1</span></div><button class="van-button van-button--danger van-button--large van-button--square"><span class="van-button__text"></span></button>
+    <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 1.1</span></div><button class="van-button van-button--danger van-button--large van-button--square van-submit-bar__button"><span class="van-button__text"></span></button>
   </div>
 </div>
 `;
@@ -11,7 +11,7 @@ exports[`decimal-length prop 1`] = `
 exports[`disable submit 1`] = `
 <div class="van-submit-bar">
   <div class="van-submit-bar__bar">
-    <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 0.01</span></div><button disabled="disabled" class="van-button van-button--danger van-button--large van-button--disabled van-button--square"><span class="van-button__text"></span></button>
+    <div class="van-submit-bar__text"><span>合计：</span><span class="van-submit-bar__price">¥ 0.01</span></div><button disabled="disabled" class="van-button van-button--danger van-button--large van-button--disabled van-button--square van-submit-bar__button"><span class="van-button__text"></span></button>
   </div>
 </div>
 `;
@@ -19,18 +19,18 @@ exports[`disable submit 1`] = `
 exports[`suffix-label prop 1`] = `
 <div class="van-submit-bar">
   <div class="van-submit-bar__bar">
-    <div class="van-submit-bar__text"><span>Label</span><span class="van-submit-bar__price">¥ 1.11</span><span class="van-submit-bar__suffix-label">Suffix Label</span></div><button class="van-button van-button--danger van-button--large van-button--square"><span class="van-button__text"></span></button>
+    <div class="van-submit-bar__text"><span>Label</span><span class="van-submit-bar__price">¥ 1.11</span><span class="van-submit-bar__suffix-label">Suffix Label</span></div><button class="van-button van-button--danger van-button--large van-button--square van-submit-bar__button"><span class="van-button__text"></span></button>
   </div>
 </div>
 `;
 
 exports[`top slot 1`] = `
-<div class="van-submit-bar">top<div class="van-submit-bar__bar"><button class="van-button van-button--danger van-button--large van-button--square"><span class="van-button__text"></span></button></div>
+<div class="van-submit-bar">top<div class="van-submit-bar__bar"><button class="van-button van-button--danger van-button--large van-button--square van-submit-bar__button"><span class="van-button__text"></span></button></div>
 </div>
 `;
 
 exports[`without price 1`] = `
 <div class="van-submit-bar">
-  <div class="van-submit-bar__bar"><button class="van-button van-button--danger van-button--large van-button--square"><span class="van-button__text"></span></button></div>
+  <div class="van-submit-bar__bar"><button class="van-button van-button--danger van-button--large van-button--square van-submit-bar__button"><span class="van-button__text"></span></button></div>
 </div>
 `;