diff --git a/build/ColumnManager.js b/build/ColumnManager.js
index ec72884..8bdf7da 100644
--- a/build/ColumnManager.js
+++ b/build/ColumnManager.js
@@ -215,7 +215,7 @@ var ColumnManager = function () {
 
   ColumnManager.prototype.getColumnWidth = function getColumnWidth(contentWidth) {
     var columns = this.leafColumns();
-    var res = { computeWidth: 0, lastShowIndex: 0 };
+    var res = { computeWidth: 0, lastShowIndex: -1 };
     columns.forEach(function (col, index) {
       //如果列显示
       if (col.ifshow) {
diff --git a/build/Table.css b/build/Table.css
index eb4a19e..3dbfffd 100644
--- a/build/Table.css
+++ b/build/Table.css
@@ -192,6 +192,8 @@
   .u-table td {
     padding: 12px 8px;
     word-break: break-all; }
+  .u-table tr th:last-child {
+    overflow: hidden; }
   .u-table-row-hover {
     background: #e3f2fd; }
   .u-table-scroll {
diff --git a/build/Table.js b/build/Table.js
index 00c78b5..565ef54 100644
--- a/build/Table.js
+++ b/build/Table.js
@@ -437,7 +437,7 @@ var Table = function (_Component) {
         _state$contentWidthDi = _state.contentWidthDiff,
         contentWidthDiff = _state$contentWidthDi === undefined ? 0 : _state$contentWidthDi,
         _state$lastShowIndex = _state.lastShowIndex,
-        lastShowIndex = _state$lastShowIndex === undefined ? 0 : _state$lastShowIndex;
+        lastShowIndex = _state$lastShowIndex === undefined ? -1 : _state$lastShowIndex;
 
     var filterCol = [];
     rows = rows || [];
diff --git a/src/ColumnManager.js b/src/ColumnManager.js
index 04f69bf..eeb8534 100644
--- a/src/ColumnManager.js
+++ b/src/ColumnManager.js
@@ -160,7 +160,7 @@ export default class ColumnManager {
   }
   getColumnWidth(contentWidth){
     let columns = this.leafColumns();
-    let res={computeWidth:0,lastShowIndex:0};
+    let res={computeWidth:0,lastShowIndex:-1};
     columns.forEach((col,index)=>{
       //如果列显示
       if(col.ifshow){
diff --git a/src/Table.js b/src/Table.js
index 8808552..489b3ba 100644
--- a/src/Table.js
+++ b/src/Table.js
@@ -341,7 +341,7 @@ class Table extends Component {
   }
 
   getHeaderRows(columns, currentRow = 0, rows) {
-    let { contentWidthDiff = 0, lastShowIndex = 0 } = this.state;
+    let { contentWidthDiff = 0, lastShowIndex = -1 } = this.state;
     let filterCol = [];
     rows = rows || [];
     rows[currentRow] = rows[currentRow] || [];
@@ -691,7 +691,7 @@ class Table extends Component {
           }else{
                //内容少，不用显示滚动条
                if(this.domWidthDiff > 0){
-                headStyle.overflowX = 'auto';
+                headStyle.overflowX = 'hidden';
               }
             headStyle.marginBottom = `0px`;
           }
diff --git a/src/Table.scss b/src/Table.scss
index 5d09157..1018293 100644
--- a/src/Table.scss
+++ b/src/Table.scss
@@ -73,7 +73,11 @@ $table-move-in-color: $bg-color-base;
     padding: $vertical-padding $horizontal-padding;
     word-break: break-all;
   }
-
+  tr {
+    th:last-child{ //拖拽tag影响了表格整体宽度
+      overflow: hidden;
+    }
+  }
   &-row-hover {
     background: rgb(227, 242, 253);
   }