diff --git a/components/group-avatar.vue b/components/group-avatar.vue
index 6d8ab1d..44b83a7 100644
--- a/components/group-avatar.vue
+++ b/components/group-avatar.vue
@@ -25,7 +25,7 @@ const props = defineProps({
   }
 })
 
-const list = computed(() => props.avatarList.map(i => i || '/static/default-avatar.png'))
+const list = computed(() => props.avatarList.map(i => i || '/static/default-avatar.svg'))
 
 const size = computed(() => {
   const val = Number.isInteger(props.size) && props.size > 0 ? props.size : 144;
diff --git a/pages/home/team-mate.vue b/pages/home/team-mate.vue
index 16ef2c6..3645836 100644
--- a/pages/home/team-mate.vue
+++ b/pages/home/team-mate.vue
@@ -13,7 +13,7 @@
           <view v-for="i in teamates" :key="i.userid"
             class="member-card flex flex-shrink-0 min-w-120 mr-15 p-15"
             @click="toHomePage(i)">
-            <image class="flex-shrink-0 avatar mr-10" :src="i.avatar || '/static/default-avatar.png'" />
+            <image class="flex-shrink-0 avatar mr-10" :src="i.avatar || '/static/default-avatar.svg'" />
             <view class="flex-grow flex flex-col justify-between">
               <view>
                 <view class="member-name leading-normal h-24 text-base font-semibold text-dark whitespace-nowrap">
diff --git a/pages/message/hooks/use-group-avatars.js b/pages/message/hooks/use-group-avatars.js
index f2ee330..30e73a8 100644
--- a/pages/message/hooks/use-group-avatars.js
+++ b/pages/message/hooks/use-group-avatars.js
@@ -10,7 +10,7 @@ export default function useGroupAvatars() {
   const groupAvatarMap = ref({}) // { groupID: [avatarUrl1, avatarUrl2, ...] }
   const teamStore = useTeamStore()
   const patientDefaultAvatar = '/static/default-patient-avatar.png'
-  const teamMemberDefaultAvatar = '/static/default-avatar.png'
+  const teamMemberDefaultAvatar = '/static/default-avatar.svg'
 
   /**
    * 获取单个群聊的头像列表
@@ -28,7 +28,7 @@ export default function useGroupAvatars() {
 
       // 获取团队成员的头像和名称
       const memberMap = await teamStore.getTeamMemberAvatarsAndName(teamId)
-      
+
       if (!memberMap || Object.keys(memberMap).length === 0) {
         console.warn(`群聊 ${groupID} 的团队成员为空`)
         return []
@@ -38,8 +38,8 @@ export default function useGroupAvatars() {
       const avatarList = Object.values(memberMap)
         .map(member => {
           // 如果成员有头像且不为空，使用成员头像；否则使用团队成员默认头像
-          return (member.avatar && member.avatar.trim() !== '') 
-            ? member.avatar 
+          return (member.avatar && member.avatar.trim() !== '')
+            ? member.avatar
             : teamMemberDefaultAvatar
         })
 
diff --git a/pages/message/hooks/use-group-chat.js b/pages/message/hooks/use-group-chat.js
index 696131b..9b09377 100644
--- a/pages/message/hooks/use-group-chat.js
+++ b/pages/message/hooks/use-group-chat.js
@@ -47,31 +47,25 @@ export default function useGroupChat(groupID) {
   const getUserAvatar = (userId) => {
     const member = chatMember.value[userId]
     if (!member) {
-      // 如果找不到成员信息，根据是否为团队成员返回默认头像
-      // 患者（userId为当前账户openid）使用 default-patient-avatar.png
-      // 其他情况使用 default-avatar.png
-      return userId === openid.value ? '/static/default-patient-avatar.png' : '/static/default-avatar.png'
+      return userId === openid.value ? '/static/default-patient-avatar.png' : '/static/default-avatar.svg'
     }
-    
+
     // 如果有头像且不为空字符串，返回头像
     if (member.avatar && member.avatar.trim() !== '') {
       return member.avatar
     }
-    
-    // 否则根据是否为团队成员返回默认头像
-    // 患者使用 default-patient-avatar.png，团队成员使用 default-avatar.png
-    return member.isTeamMember ? '/static/default-avatar.png' : '/static/default-patient-avatar.png'
-  }
 
+    return member.isTeamMember ? '/static/default-avatar.svg' : '/static/default-patient-avatar.png'
+  }
   // 获取群聊信息和成员头像
   async function getGroupInfo() {
     const gid = typeof groupID === 'string' ? groupID : groupID.value
     if (!gid) return
-    
+
     try {
       // 1. 获取群聊基本信息
       const groupResult = await api('getGroupListByGroupId', { groupId: gid })
-      
+
       if (groupResult && groupResult.success && groupResult.data) {
         groupInfo.value = {
           groupID: gid,
@@ -79,14 +73,14 @@ export default function useGroupChat(groupID) {
           status: groupResult.data.orderStatus || 'active',
           teamId: groupResult.data.teamId
         }
-        
+
         // 2. 如果有teamId，获取团队成员头像和名称
         if (groupResult.data.teamId) {
           const memberMap = await teamStore.getTeamMemberAvatarsAndName(groupResult.data.teamId)
-          
+
           // 3. 存储团队成员ID列表
           teamMemberIds.value = Object.keys(memberMap)
-          
+
           // 4. 构建团队成员列表（从返回的 { userId: { avatar, name } } 中提取）
           members.value = teamMemberIds.value.map(userId => {
             const memberInfo = memberMap[userId] || {}
@@ -97,7 +91,7 @@ export default function useGroupChat(groupID) {
               isTeamMember: true
             }
           })
-          
+
           // 5. 添加患者信息（使用默认患者头像）
           if (groupResult.data.patient) {
             const pid = groupResult.data.patientId?.toString() || ''
diff --git a/pages/team/friend.vue b/pages/team/friend.vue
index 5681332..d7f62a8 100644
--- a/pages/team/friend.vue
+++ b/pages/team/friend.vue
@@ -2,7 +2,7 @@
   <view v-if="member" class="flex flex-col h-full items-center justify-center">
     <view class="business-card">
       <view class="flex">
-        <image class="mr-10 avatar" :src="member.avatar || '/static/default-avatar.png'"></image>
+        <image class="mr-10 avatar" :src="member.avatar || '/static/default-avatar.svg'"></image>
         <view class="w-0 flex-grow leading-normal">
           <view class="flex items-center">
             <view class="mr-5 text-lg font-semibold text-dark">{{ member.anotherName }}</view>
diff --git a/pages/team/team-detail.vue b/pages/team/team-detail.vue
index b861d8c..647c9da 100644
--- a/pages/team/team-detail.vue
+++ b/pages/team/team-detail.vue
@@ -25,7 +25,7 @@
       </view>
       <view v-for="i in teammate.leaders" :key="i._id" class="mt-12 flex p-10 border-primary rounded-sm"
         @click="toHomePage(i.userid)">
-        <image class="flex-shrink-0 mr-10 avatar" :src="i.avatar || '/static/default-avatar.png'"></image>
+        <image class="flex-shrink-0 mr-10 avatar" :src="i.avatar || '/static/default-avatar.svg'"></image>
         <view class="w-0 flex-grow leading-normal">
           <view class="flex items-center justify-between">
             <view class="flex-shrink-0 mr-5 view-lg text-dark font-semibold">{{ i.anotherName }}</view>
@@ -50,7 +50,7 @@
       </view>
       <view v-for="i in teammate.members" :key="i._id" class="mt-12 flex p-10 border-primary rounded-sm"
         @click="toHomePage(i.userid)">
-        <image class="flex-shrink-0 mr-10 avatar" :src="i.avatar || '/static/default-avatar.png'"></image>
+        <image class="flex-shrink-0 mr-10 avatar" :src="i.avatar || '/static/default-avatar.svg'"></image>
         <view class="w-0 flex-grow leading-normal">
           <view class="flex items-center justify-between">
             <view class="flex-shrink-0 mr-5 view-lg text-dark font-semibold">{{ i.anotherName }}</view>
diff --git a/utils/conversation-merger.js b/utils/conversation-merger.js
index a4ae454..3149f6d 100644
--- a/utils/conversation-merger.js
+++ b/utils/conversation-merger.js
@@ -144,7 +144,7 @@ function mergeConversationData(conversation, groupDetailsMap) {
     name: formatConversationName(groupDetail),
 
     // 更新头像（优先使用已有头像，避免闪动）
-    avatar: conversation.avatar || groupDetail.patient?.avatar || '/static/default-avatar.png',
+    avatar: conversation.avatar || groupDetail.patient?.avatar || '/static/default-avatar.svg',
 
     // 【修复】保留未读消息数（确保不被覆盖）
     unreadCount: conversation.unreadCount || 0