diff --git a/WebApp/client/public/onebyone/store.js b/WebApp/client/public/onebyone/store.js
index 84ccf13..b995968 100644
--- a/WebApp/client/public/onebyone/store.js
+++ b/WebApp/client/public/onebyone/store.js
@@ -347,6 +347,18 @@ class CallStateManager {
             this.state.session.status = 'ongoing';
             this.notify({ type: 'CALL_STATUS_CHANGE', status: 'ongoing' });
 
+            // 参与者加入时默认静音：禁用音频轨道并更新状态
+            if (this.role === 'participant') {
+                if (this.state.localStream) {
+                    this.state.localStream.getAudioTracks().forEach(track => {
+                        track.enabled = false;
+                    });
+                }
+                this.state.session.localUser.mediaState.audio = false;
+                this.notify({ type: 'LOCAL_MEDIA_CHANGE', mediaType: 'audio', value: false });
+                console.log('Participant joined with audio muted by default');
+            }
+
             // 连接建立后发送本地用户信息
             this.sendMessage('user-info', {
                 id: this.state.session.localUser.id,
@@ -354,6 +366,9 @@ class CallStateManager {
                 avatar: this.state.session.localUser.avatar
             });
 
+            // 发送当前媒体状态，确保远端收到正确的初始状态
+            this.emitMediaStateChange();
+
             if (this.state.localStream) {
                 // const tracks = this.state.localStream.getTracks();
                 // for (const track of tracks) {
@@ -381,7 +396,7 @@ class CallStateManager {
                     id: '',
                     name: '参与者',
                     avatar: '/images/p2.png',
-                    mediaState: { audio: false, video: false, isSpeaking: false },
+                    mediaState: { audio: false, video: true, isSpeaking: false },
                     status: 'online'
                 };
             }
@@ -449,7 +464,7 @@ class CallStateManager {
                         id: '',
                         name: '参与者',
                         avatar: '/images/p2.png',
-                        mediaState: { audio: false, video: false, isSpeaking: false },
+                        mediaState: { audio: false, video: true, isSpeaking: false },
                         status: 'online'
                     };
                     this.notify({ type: 'PARTICIPANTS_UPDATE', participants: this.state.participants });
@@ -546,7 +561,7 @@ class CallStateManager {
                                 id: '',
                                 name: '参与者',
                                 avatar: '/images/p2.png',
-                                mediaState: { audio: false, video: false, isSpeaking: false },
+                                mediaState: { audio: false, video: true, isSpeaking: false },
                                 status: 'online'
                             };
                         }