diff --git a/Test/event-bus-test.js b/Test/event-bus-test.js
index 631799e..7222e62 100644
--- a/Test/event-bus-test.js
+++ b/Test/event-bus-test.js
@@ -14,9 +14,16 @@ const lileiCallback1 = (...payload) => {
   console.log("lileiCallback1:", payload)
 }
 
+const symbolCallback1 = (...payload) => {
+  console.log("symbolCallback1:", payload)
+}
+
+const s1 = Symbol('symbol1')
+
 eventBus.on("why", whyCallback1)
 eventBus.on("why", whyCallback2)
 eventBus.on('lilei', lileiCallback1)
+eventBus.on(s1, whyCallback1)
 eventBus.once("why", (...payload) => {
   console.log("why once:", payload)
 })
@@ -24,14 +31,17 @@ eventBus.once("why", (...payload) => {
 setTimeout(() => {
   eventBus.emit("why", "abc", "cba", "nba")
   eventBus.emit("lilei", "abc", "cba", "nba")
+  eventBus.emit(s1, 111, 222, 333)
 }, 1000);
 
 setTimeout(() => {
   eventBus.off("why", whyCallback1)
   eventBus.off("lilei", lileiCallback1)
+  eventBus.off(s1, whyCallback1)
 }, 2000);
 
 setTimeout(() => {
   eventBus.emit("why")
   eventBus.emit("lilei")
+  eventBus.emit(s1)
 }, 3000);
diff --git a/src/event-bus.js b/src/event-bus.js
index d2e8416..20ea040 100644
--- a/src/event-bus.js
+++ b/src/event-bus.js
@@ -4,14 +4,14 @@ class HYEventBus {
   }
 
   on(eventName, eventCallback, thisArg) {
-    if (typeof eventName !== "string") {
-      throw new TypeError("the event name must be string type")
+    if (typeof eventName !== "string" && typeof eventName !== "symbol") {
+      throw new TypeError("the event name must be string type or symbol type")
     }
 
     if (typeof eventCallback !== "function") {
       throw new TypeError("the event callback must be function type")
     }
-    
+
     let hanlders = this.eventBus[eventName]
     if (!hanlders) {
       hanlders = []
@@ -26,14 +26,14 @@ class HYEventBus {
   }
 
   once(eventName, eventCallback, thisArg) {
-    if (typeof eventName !== "string") {
-      throw new TypeError("the event name must be string type")
+    if (typeof eventName !== "string" && typeof eventName !== "symbol") {
+      throw new TypeError("the event name must be string type or symbol type")
     }
 
     if (typeof eventCallback !== "function") {
       throw new TypeError("the event callback must be function type")
     }
-    
+
     const tempCallback = (...payload) => {
       this.off(eventName, tempCallback)
       eventCallback.apply(thisArg, payload)
@@ -43,8 +43,8 @@ class HYEventBus {
   }
 
   emit(eventName, ...payload) {
-    if (typeof eventName !== "string") {
-      throw new TypeError("the event name must be string type")
+    if (typeof eventName !== "string" && typeof eventName !== "symbol") {
+      throw new TypeError("the event name must be string type or symbol type")
     }
 
     const handlers = this.eventBus[eventName] || []
@@ -55,8 +55,8 @@ class HYEventBus {
   }
 
   off(eventName, eventCallback) {
-    if (typeof eventName !== "string") {
-      throw new TypeError("the event name must be string type")
+    if (typeof eventName !== "string" && typeof eventName !== "symbol") {
+      throw new TypeError("the event name must be string type or symbol type")
     }
 
     if (typeof eventCallback !== "function") {