diff --git a/components/group-avatar.vue b/components/group-avatar.vue
index 44b83a7..6d8ab1d 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.svg'))
+const list = computed(() => props.avatarList.map(i => i || '/static/default-avatar.png'))
 
 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 3645836..16ef2c6 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.svg'" />
+            <image class="flex-shrink-0 avatar mr-10" :src="i.avatar || '/static/default-avatar.png'" />
             <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 30e73a8..1a822b5 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.svg'
+  const teamMemberDefaultAvatar = '/static/default-avatar.png'
 
   /**
    * 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 9b09377..f1ab4cd 100644
--- a/pages/message/hooks/use-group-chat.js
+++ b/pages/message/hooks/use-group-chat.js
@@ -47,7 +47,7 @@ export default function useGroupChat(groupID) {
   const getUserAvatar = (userId) => {
     const member = chatMember.value[userId]
     if (!member) {
-      return userId === openid.value ? '/static/default-patient-avatar.png' : '/static/default-avatar.svg'
+      return userId === openid.value ? '/static/default-patient-avatar.png' : '/static/default-avatar.png'
     }
 
     // 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) {
       return member.avatar
     }
 
-    return member.isTeamMember ? '/static/default-avatar.svg' : '/static/default-patient-avatar.png'
+    return member.isTeamMember ? '/static/default-avatar.png' : '/static/default-patient-avatar.png'
   }
   // 获取群聊信息和成员头像
   async function getGroupInfo() {
diff --git a/pages/team/friend.vue b/pages/team/friend.vue
index d7f62a8..5681332 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.svg'"></image>
+        <image class="mr-10 avatar" :src="member.avatar || '/static/default-avatar.png'"></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 647c9da..b861d8c 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.svg'"></image>
+        <image class="flex-shrink-0 mr-10 avatar" :src="i.avatar || '/static/default-avatar.png'"></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.svg'"></image>
+        <image class="flex-shrink-0 mr-10 avatar" :src="i.avatar || '/static/default-avatar.png'"></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 3149f6d..a4ae454 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.svg',
+    avatar: conversation.avatar || groupDetail.patient?.avatar || '/static/default-avatar.png',
 
     // 【修复】保留未读消息数（确保不被覆盖）
     unreadCount: conversation.unreadCount || 0