diff --git a/demo/js/base/button/demo.button.js b/demo/js/base/button/demo.button.js
index 981683e84..2514b949e 100644
--- a/demo/js/base/button/demo.button.js
+++ b/demo/js/base/button/demo.button.js
@@ -385,6 +385,11 @@ Demo.Button = BI.inherit(BI.Widget, {
             type: "bi.button",
             text: "小于最小宽度的按钮",
             width: 50,
+        }, {
+            type: "bi.button",
+            text: "一个文字超级超级长的 button, 他比按钮宽度还长。",
+            textWidth: 500,
+            width: 100,
         }];
 
         return {
diff --git a/src/base/single/button/buttons/button.js b/src/base/single/button/buttons/button.js
index a06f23191..bc1468450 100644
--- a/src/base/single/button/buttons/button.js
+++ b/src/base/single/button/buttons/button.js
@@ -81,7 +81,7 @@
                 },
                 hgap: o.hgap,
                 vgap: o.vgap,
-                items: self.generateItems()
+                items: self.generateItems(),
             });
 
             // 如果 options 对应的属性为 true 则给元素添加 class
@@ -102,7 +102,7 @@
 
             // 由于button默认情况下有个边框，所以要主动算行高
             var lineHeight, textHeight = o.textHeight;
-            var hasBorder = false
+            var hasBorder = false;
             if (BI.isNumber(o.height)) {
                 if (!isVertical(o.iconPosition)) {
                     if (!(o.clear && o.block && o.light)) {
@@ -121,12 +121,12 @@
 
             var iconInvisible = !(o.loading || o.iconCls || o.icon || defaultRenderIcon);
 
-            var textWidth = o.textWidth;
-            if (BI.isNull(o.textWidth)) {
-                textWidth = (o.minWidth > 0 && o.width < o.minWidth) ? o.minWidth : o.width;
-                textWidth -= (o.hgap * 2 + o.iconGap)
-                textWidth -= iconInvisible || isVertical(o.iconPosition) ? 0 : this._const.iconWidth
-            }
+            var maxTextWidth = Math.max(o.minWidth, o.width);
+            maxTextWidth -= (o.hgap * 2 + o.iconGap);
+            // 减去图标水平占位宽度
+            maxTextWidth -= iconInvisible || isVertical(o.iconPosition) ? 0 : this._const.iconWidth;
+            var textWidth = BI.isNull(o.textWidth) ? maxTextWidth : Math.min(o.textWidth, maxTextWidth);
+
             this.text = BI.createWidget({
                 type: "bi.label",
                 text: o.text,
@@ -140,7 +140,7 @@
             });
 
             if (iconInvisible) {
-                return [this.text]
+                return [this.text];
             }
 
             this._iconRendered = true;