diff --git a/changelog.md b/changelog.md
index c4c3d67d5..ace18e4cb 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,6 @@
 # 更新日志
 2.0(2020-2)
+- 拓展BI.concat,使其可以拼接多个数组
 - 修复勾选节点不影响父子节点勾选状态的树搜索选中getValue不正常的问题
 
 2.0(2020-1)
diff --git a/src/core/__test__/base.test.js b/src/core/__test__/base.test.js
index 5184f79bf..1b3ab1ebd 100644
--- a/src/core/__test__/base.test.js
+++ b/src/core/__test__/base.test.js
@@ -107,4 +107,26 @@ describe("baseFunctionTest", function () {
         var a = BI.makeArray(2, 1);
         expect(a).to.deep.equal([1, 1]);
     });
+
+
+    /**
+     * test_author_windy
+     */
+    it("concat-string", function () {
+        // concat-string
+        expect(BI.concat("a", "b", "c")).to.equal("abc");
+
+        // concat-array
+        expect(BI.concat([1], [2], [3])).to.deep.equal([1, 2, 3]);
+
+        // concat-object-array
+        expect(BI.concat([{text: 1, value: 1}], [{text: 2, value: 2}], [{text: 3, value: 3}])).to.deep.equal([{text: 1, value: 1}, {text: 2, value: 2}, {text: 3, value: 3}]);
+
+        // concat-object
+        expect(BI.concat({a: 1}, {b: 2}, {c: 3})).to.deep.equal({
+            a: 1,
+            b: 2,
+            c: 3
+        });
+    });
 });
diff --git a/src/core/base.js b/src/core/base.js
index 6d326cea1..b6179928f 100644
--- a/src/core/base.js
+++ b/src/core/base.js
@@ -225,13 +225,15 @@ if (!_global.BI) {
 
         concat: function (obj1, obj2) {
             if (BI.isKey(obj1)) {
-                return obj1 + "" + obj2;
+                return BI.map([].slice.apply(arguments), function (idx, v) {
+                    return v;
+                }).join("");
             }
             if (BI.isArray(obj1)) {
-                return obj1.concat(obj2);
+                return [].concat.apply([], arguments);
             }
             if (BI.isObject(obj1)) {
-                return _.extend({}, obj1, obj2);
+                return _.extend.apply({}, arguments);
             }
         },