diff --git a/src/pages/file/item/desptopView.vue b/src/pages/file/item/desptopView.vue
index f6f2986..9b99982 100644
--- a/src/pages/file/item/desptopView.vue
+++ b/src/pages/file/item/desptopView.vue
@@ -7,8 +7,15 @@
       <div
         v-if="isRemoteDesktopActive && !isDesktopCollapsed"
         class="desktop-overlay"
+        @mousemove="handleOverlayMouseMove"
+        @mouseleave="handleOverlayMouseLeave"
       >
-        <div class="overlay-header">
+        <div
+          class="overlay-header"
+          :class="{
+            'fullscreen-hidden': isFullscreen && !isFullscreenHeaderVisible,
+          }"
+        >
           <div class="header-left">
             <svg
               width="18"
@@ -28,6 +35,41 @@
             }}</span>
           </div>
           <div class="header-right">
+            <button
+              v-if="desktopStream"
+              class="header-btn"
+              :class="{ 'sound-enabled': isDesktopSoundEnabled }"
+              @click="toggleDesktopSound"
+              :title="isDesktopSoundEnabled ? '静音' : '开启声音'"
+            >
+              <svg
+                v-if="isDesktopSoundEnabled"
+                width="16"
+                height="16"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+              >
+                <polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5" />
+                <path d="M19.07 4.93a10 10 0 0 1 0 14.14" />
+                <path d="M15.54 8.46a5 5 0 0 1 0 7.07" />
+              </svg>
+              <svg
+                v-else
+                width="16"
+                height="16"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+              >
+                <polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5" />
+                <line x1="23" y1="9" x2="17" y2="15" />
+                <line x1="17" y1="9" x2="23" y2="15" />
+              </svg>
+              <span>{{ isDesktopSoundEnabled ? "出声" : "静音" }}</span>
+            </button>
             <button
               v-if="desktopStream"
               class="header-btn"
@@ -759,7 +801,10 @@ const isCameraActive = ref(false);
 const isCameraLocalSharing = ref(false);
 const isCallActive = ref(false);
 const isFullscreen = ref(false);
+const isFullscreenHeaderVisible = ref(false);
 const isCallMuted = ref(false);
+const isDesktopSoundEnabled = ref(false);
+let fullscreenHeaderTimer: number | null = null;
 const isDesktopCollapsed = ref(false);
 const isDesktopShareCollapsed = ref(false);
 const isCameraCollapsed = ref(false);
@@ -851,7 +896,7 @@ const bindDesktopVideo = async () => {
   if (videoRef.value.srcObject !== desktopStream.value) {
     videoRef.value.srcObject = desktopStream.value;
   }
-  videoRef.value.muted = true;
+  videoRef.value.muted = !isDesktopSoundEnabled.value;
   videoRef.value.play().catch(() => {
     message.warning("浏览器阻止了自动播放，请点击桌面画面恢复播放");
   });
@@ -1045,6 +1090,13 @@ const toggleCallMuted = () => {
   }
 };
 
+const toggleDesktopSound = () => {
+  isDesktopSoundEnabled.value = !isDesktopSoundEnabled.value;
+  if (videoRef.value) {
+    videoRef.value.muted = !isDesktopSoundEnabled.value;
+  }
+};
+
 const toggleFullscreen = async () => {
   if (!videoContainer.value) return;
   try {
@@ -1064,6 +1116,35 @@ const toggleFullscreen = async () => {
 
 const handleFullscreenChange = () => {
   isFullscreen.value = !!document.fullscreenElement;
+  isFullscreenHeaderVisible.value = false;
+};
+
+const handleOverlayMouseMove = (event: MouseEvent) => {
+  if (!isFullscreen.value) return;
+  if (event.clientY < 80) {
+    isFullscreenHeaderVisible.value = true;
+    if (fullscreenHeaderTimer !== null) {
+      clearTimeout(fullscreenHeaderTimer);
+      fullscreenHeaderTimer = null;
+    }
+  } else if (
+    isFullscreenHeaderVisible.value &&
+    fullscreenHeaderTimer === null
+  ) {
+    fullscreenHeaderTimer = window.setTimeout(() => {
+      isFullscreenHeaderVisible.value = false;
+      fullscreenHeaderTimer = null;
+    }, 2000);
+  }
+};
+
+const handleOverlayMouseLeave = () => {
+  if (!isFullscreen.value) return;
+  if (fullscreenHeaderTimer !== null) {
+    clearTimeout(fullscreenHeaderTimer);
+    fullscreenHeaderTimer = null;
+  }
+  isFullscreenHeaderVisible.value = false;
 };
 
 const streamListener: EventListener = (event) => {
@@ -1103,6 +1184,10 @@ onUnmounted(() => {
   peer.off("call-started", callStartedListener);
   peer.off("media-ended", mediaEndedListener);
   document.removeEventListener("fullscreenchange", handleFullscreenChange);
+  if (fullscreenHeaderTimer !== null) {
+    clearTimeout(fullscreenHeaderTimer);
+    fullscreenHeaderTimer = null;
+  }
   stopDurationTimer();
   desktopStream.value?.getTracks().forEach((track) => track.stop());
   cameraStream.value?.getTracks().forEach((track) => track.stop());
@@ -1154,6 +1239,11 @@ onUnmounted(() => {
   background: rgba(0, 0, 0, 0.9);
   border-bottom: 1px solid rgba(255, 255, 255, 0.08);
   flex-shrink: 0;
+  transition: opacity 0.3s ease;
+}
+.overlay-header.fullscreen-hidden {
+  opacity: 0;
+  pointer-events: none;
 }
 
 .header-left {
@@ -1194,6 +1284,16 @@ onUnmounted(() => {
   border-color: #f5222d;
   color: #f5222d;
 }
+.header-btn.sound-enabled {
+  background: rgba(0, 180, 42, 0.15);
+  border-color: #00b42a;
+  color: #00b42a;
+}
+.header-btn.sound-enabled:hover {
+  background: rgba(0, 180, 42, 0.25);
+  border-color: #00b42a;
+  color: #00d439;
+}
 
 .duration-text {
   font-size: 12px;
diff --git a/src/pages/file/utils/peer.ts b/src/pages/file/utils/peer.ts
index 9c75902..d26c62f 100644
--- a/src/pages/file/utils/peer.ts
+++ b/src/pages/file/utils/peer.ts
@@ -114,7 +114,7 @@ class Peer extends EventTarget {
           if (type === "desktop") {
             stream = await navigator.mediaDevices.getDisplayMedia({
               video: true,
-              audio: false,
+              audio: true,
             });
           } else if (type === "camera") {
             stream = await navigator.mediaDevices.getUserMedia({