diff --git a/components/group-avatar.vue b/components/group-avatar.vue
index 0370611..7961f21 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 c5f9d14..a4749cf 100644
--- a/pages/message/hooks/use-group-avatars.js
+++ b/pages/message/hooks/use-group-avatars.js
@@ -9,7 +9,7 @@ import useTeamStore from '@/store/team.js'
 export default function useGroupAvatars() {
   const groupAvatarMap = ref({}) // { groupID: [avatarUrl1, avatarUrl2, ...] }
   const teamStore = useTeamStore()
-  const patientDefaultAvatar = '/static/default-avatar.png'
+  const patientDefaultAvatar = '/static/default-avatar.svg'
 
   /**
    * 获取单个群聊的头像列表
diff --git a/pages/message/hooks/use-group-chat.js b/pages/message/hooks/use-group-chat.js
index 9860650..7d4a0fc 100644
--- a/pages/message/hooks/use-group-chat.js
+++ b/pages/message/hooks/use-group-chat.js
@@ -45,8 +45,8 @@ export default function useGroupChat(groupID) {
     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
-      // 团队成员和患者都使用 default-avatar.png
-      return '/static/default-avatar.png'
+      // 团队成员和患者都使用 default-avatar.svg
+      return '/static/default-avatar.svg'
     }
     
     // 如果有头像且不为空字符串，返回头像
@@ -55,7 +55,7 @@ export default function useGroupChat(groupID) {
     }
     
     // 否则使用默认头像
-    return '/static/default-avatar.png'
+    return '/static/default-avatar.svg'
   }
 
   // 获取群聊信息和成员头像
diff --git a/pages/team/friend.vue b/pages/team/friend.vue
index 56ba737..d2ca011 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 149037f..06430d2 100644
--- a/pages/team/team-detail.vue
+++ b/pages/team/team-detail.vue
@@ -20,7 +20,7 @@
       </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>
@@ -45,7 +45,7 @@
       </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>
@@ -83,7 +83,7 @@ const { memberJob, memberList: list } = useJob();
 
 const memberList = computed(() => team.value && Array.isArray(team.value.memberList) ? team.value.memberList : [])
 
-const avatarList = computed(() => memberList.value.map(i => i.avatar || '/static/default-avatar.png').filter(Boolean))
+const avatarList = computed(() => memberList.value.map(i => i.avatar || '/static/default-avatar.svg').filter(Boolean))
 
 const teammate = computed(() => {
   const memberLeaderList = team.value && Array.isArray(team.value.memberLeaderList) ? team.value.memberLeaderList : [];
diff --git a/utils/conversation-merger.js b/utils/conversation-merger.js
index 186bf5a..78aa260 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'
   }
 }
 
diff --git a/utils/tim-chat.js b/utils/tim-chat.js
index 80131f5..2571c51 100644
--- a/utils/tim-chat.js
+++ b/utils/tim-chat.js
@@ -2625,7 +2625,7 @@ class TimChatManager {
 				conversationID,
 				groupID,
 				name: patientName ? `${patientName}的问诊` : groupName || '问诊群聊',
-				avatar: '/static/default-avatar.png',
+				avatar: '/static/default-avatar.svg',
 				lastMessage,
 				lastMessageTime,
 				unreadCount: conversation.unreadCount || 0,
@@ -2638,7 +2638,7 @@ class TimChatManager {
 				conversationID: conversation.conversationID,
 				groupID: conversation.conversationID?.replace('GROUP', '') || '',
 				name: '问诊群聊',
-				avatar: '/static/default-avatar.png',
+				avatar: '/static/default-avatar.svg',
 				lastMessage: '暂无消息',
 				lastMessageTime: Date.now(),
 				unreadCount: 0,