diff --git a/examples/docs/en-US/tree.md b/examples/docs/en-US/tree.md
index d0a0c7a38..6e17a0fbf 100644
--- a/examples/docs/en-US/tree.md
+++ b/examples/docs/en-US/tree.md
@@ -1212,7 +1212,7 @@ You can drag and drop Tree nodes by adding a `draggable` attribute.
 | getHalfCheckedKeys | If the node can be selected (`show-checkbox` is `true`), it returns the currently half selected array of node's keys | - |
 | getCurrentKey   | return the highlight node's key (null if no node is highlighted) | — |
 | getCurrentNode  | return the highlight node (null if no node is highlighted) | — |
-| setCurrentKey   | set highlighted node by key, only works when `node-key` is assigned | (key) the node's key to be highlighted |
+| setCurrentKey   | set highlighted node by key, only works when `node-key` is assigned | (key) the node's key to be highlighted. If `null`, cancel the currently highlighted node |
 | setCurrentNode  | set highlighted node, only works when `node-key` is assigned | (node) the node to be highlighted |
 | getNode         | get node by data or key | (data) the node's data or key |
 | remove          | remove a node | (data) the node's data or node to be deleted |
diff --git a/examples/docs/es/tree.md b/examples/docs/es/tree.md
index c98774692..cc79a7d71 100644
--- a/examples/docs/es/tree.md
+++ b/examples/docs/es/tree.md
@@ -1210,7 +1210,7 @@ You can drag and drop Tree nodes by adding a `draggable` attribute.
 | getHalfCheckedKeys | Si el nodo puede ser seleccionado (`show-checkbox` es `true`), devuelve la mitad de la matriz de claves del nodo actualmente seleccionado. | - |
 | getCurrentKey     | devuelve la clave del nodo resaltado actualmente (null si no hay ninguno) | —                                        |
 | getCurrentNode    | devuelve el nodo resaltado (null si no hay ninguno) | —                                        |
-| setCurrentKey     | establece el nodo resaltado por la clave, solo funciona si `node-key` está asignado | (key) la clave del nodo a ser resaltado  |
+| setCurrentKey     | establece el nodo resaltado por la clave, solo funciona si `node-key` está asignado | (key) la clave del nodo a ser resaltado. If `null`, cancel the currently highlighted node  |
 | setCurrentNode    | establece el nodo resaltado, solo funciona si `node-key` está asignado | (node) nodo a ser resaltado              |
 | getNode         | devuelve el nodo por el dato o la clave | (data) los datos o clave del nodo |
 | remove          | elimina un nodo | (data) los datos del nodo o nodo a borrar |
diff --git a/examples/docs/zh-CN/tree.md b/examples/docs/zh-CN/tree.md
index 02274583f..8e53dc86d 100644
--- a/examples/docs/zh-CN/tree.md
+++ b/examples/docs/zh-CN/tree.md
@@ -1233,7 +1233,7 @@
 | getHalfCheckedKeys | 若节点可被选择（即 `show-checkbox` 为 `true`），则返回目前半选中的节点的 key 所组成的数组 | - |
 | getCurrentKey   | 获取当前被选中节点的 key，使用此方法必须设置 node-key 属性，若没有节点被选中则返回 null | — |
 | getCurrentNode  | 获取当前被选中节点的 node，若没有节点被选中则返回 null | — |
-| setCurrentKey   | 通过 key 设置某个节点的当前选中状态，使用此方法必须设置 node-key 属性 | (key) 待被选节点的 key |
+| setCurrentKey   | 通过 key 设置某个节点的当前选中状态，使用此方法必须设置 node-key 属性 | (key) 待被选节点的 key，若为 null 则取消当前高亮的节点 |
 | setCurrentNode  | 通过 node 设置某个节点的当前选中状态，使用此方法必须设置 node-key 属性 | (node) 待被选节点的 node |
 | getNode         | 根据 data 或者 key 拿到 Tree 组件中的 node | (data) 要获得 node 的 key 或者 data |
 | remove          | 删除 Tree 中的一个节点 | (data) 要删除的节点的 data、key 或者 node |
diff --git a/packages/tree/src/model/tree-store.js b/packages/tree/src/model/tree-store.js
index 99a453e70..79cc59470 100644
--- a/packages/tree/src/model/tree-store.js
+++ b/packages/tree/src/model/tree-store.js
@@ -322,6 +322,10 @@ export default class TreeStore {
   }
 
   setCurrentNodeKey(key) {
+    if (key === null) {
+      this.currentNode = null;
+      return;
+    }
     const node = this.getNode(key);
     if (node) {
       this.currentNode = node;
diff --git a/test/unit/specs/tree.spec.js b/test/unit/specs/tree.spec.js
index f6e297648..935919ea5 100644
--- a/test/unit/specs/tree.spec.js
+++ b/test/unit/specs/tree.spec.js
@@ -448,7 +448,12 @@ describe('Tree', () => {
     tree.setCurrentKey(111);
     vm.$nextTick(() => {
       expect(tree.store.currentNode.data.id).to.equal(111);
-      done();
+      // cancel highlight
+      tree.setCurrentKey(null);
+      vm.$nextTick(() => {
+        expect(tree.store.currentNode).to.equal(null);
+        done();
+      });
     });
   });