diff --git a/src/Table.js b/src/Table.js
index 7665b31..b2ea142 100644
--- a/src/Table.js
+++ b/src/Table.js
@@ -628,7 +628,7 @@ class Table extends Component {
         width = width + contentWidthDiff;
       }
       if (!fixed && c.fixed) {
-        fixedClass = `${this.props.clsPrefix}-row-fixed-columns-in-body`;
+        fixedClass = ` ${this.props.clsPrefix}-row-fixed-columns-in-body`;
       }
       return <col key={c.key} style={{ width: width, minWidth: c.width }} className={fixedClass}/>;
     }));
diff --git a/src/TableHeader.js b/src/TableHeader.js
index eec21a8..e99dc6f 100644
--- a/src/TableHeader.js
+++ b/src/TableHeader.js
@@ -549,7 +549,7 @@ class TableHeader extends Component {
               let canDotDrag = "";
               //主表格下、固定列或者是过滤行中含有固定列时添加该属性
               if (!fixed && (da.fixed || (filterable && index == rows.length - 1 && rows[0][columIndex].fixed)) ) {
-                fixedStyle = `${clsPrefix}-row-fixed-columns-in-body`;
+                fixedStyle = ` ${clsPrefix}-row-fixed-columns-in-body`;
               }
            
               if (lastShowIndex == columIndex) {