diff --git a/src/modules/table.js b/src/modules/table.js
index 3990c889..2b0d7ef4 100644
--- a/src/modules/table.js
+++ b/src/modules/table.js
@@ -353,13 +353,13 @@ layui.define(['lay', 'laytpl', 'laypage', 'form', 'util'], function(exports){
 
     // 高度铺满：full-差距值
     if(options.height && /^full-.+$/.test(options.height)){
-      that.fullHeightGap = parseFloat(options.height.split('-')[1]) || 0;
-      options.height = _WIN.height() - that.fullHeightGap;
+      that.fullHeightGap = options.height.split('-')[1];
+      options.height = _WIN.height() - (parseFloat(that.fullHeightGap) || 0);
     } else if (options.height && /^#\w+\S*-.+$/.test(options.height)) {
       var parentDiv = options.height.split("-");
-      that.parentHeightGap = parseFloat(parentDiv.pop()) || 0;
+      that.parentHeightGap = parentDiv.pop();
       that.parentDiv = parentDiv.join("-");
-      options.height = $(that.parentDiv).height() - that.parentHeightGap;
+      options.height = $(that.parentDiv).height() - (parseFloat(that.parentHeightGap) || 0);
     }
 
     // 开始插入替代元素