diff --git a/index.html b/index.html
index f15e7e6..82d7b1f 100644
--- a/index.html
+++ b/index.html
@@ -335,6 +335,17 @@
                     <div class="control-value" id="rain-speed-value">1.00</div>
                 </div>
             </div>
+            <div class="control-toggle" style="margin-top: 8px;">
+                <label for="rain-audio-enabled">启用雨声</label>
+                <input type="checkbox" id="rain-audio-enabled">
+            </div>
+            <div class="control-grid">
+                <div class="control-group full-width">
+                    <label>雨声音量</label>
+                    <input type="range" id="rain-audio-volume" min="0" max="1" value="0.35" step="0.01">
+                    <div class="control-value" id="rain-audio-volume-value">0.35</div>
+                </div>
+            </div>
         </div>
 
         <div class="control-section">
diff --git a/public/audio/rain-calming.mp3 b/public/audio/rain-calming.mp3
new file mode 100644
index 0000000..a97f334
Binary files /dev/null and b/public/audio/rain-calming.mp3 differ
diff --git a/src/OceanScene.js b/src/OceanScene.js
index 1b6c7df..46562f3 100644
--- a/src/OceanScene.js
+++ b/src/OceanScene.js
@@ -9,6 +9,8 @@ import { ShaderPass } from 'three/addons/postprocessing/ShaderPass.js';
 import { TerrainGenerator } from './TerrainGenerator.js';
 import { VegetationSystem } from './VegetationSystem.js';
 
+const RAIN_AUDIO_URL = '/audio/rain-calming.mp3';
+
 export class OceanScene {
     constructor(container) {
         this.container = container;
@@ -38,6 +40,7 @@ export class OceanScene {
         this.fogLayers = [];
         this.horizonFog = null;
         this.skyHazeBand = null;
+        this.rainAudio = null;
         
         this.params = {
             elevation: 2,
@@ -59,6 +62,8 @@ export class OceanScene {
             rainVeilIntensity: 1.15,
             rainDropSize: 1.0,
             rainSpeed: 1.0,
+            rainAudioEnabled: false,
+            rainAudioVolume: 0.35,
             lightningEnabled: false,
             lightningIntensity: 0.75,
             mieCoefficient: 0.005,
@@ -82,6 +87,7 @@ export class OceanScene {
         this.initControls();
         this.initLighting();
         this.initPostProcessing();
+        this.initAudio();
         await this.initSky();
         this.initClouds();
         this.initFog();
@@ -180,6 +186,14 @@ export class OceanScene {
         this.composer.addPass(this.rainPass);
     }
 
+    initAudio() {
+        this.rainAudio = new Audio(RAIN_AUDIO_URL);
+        this.rainAudio.loop = true;
+        this.rainAudio.preload = 'auto';
+        this.rainAudio.volume = this.params.rainAudioVolume;
+        this.rainAudio.crossOrigin = 'anonymous';
+    }
+
     createRainShader() {
         return {
             uniforms: {
@@ -1028,6 +1042,7 @@ export class OceanScene {
         if (this.rainPass) {
             this.rainPass.enabled = value;
         }
+        this.updateRainAudioState();
     }
 
     setRainScreenIntensity(value) {
@@ -1058,6 +1073,35 @@ export class OceanScene {
         }
     }
 
+    setRainAudioEnabled(value) {
+        this.params.rainAudioEnabled = value;
+        this.updateRainAudioState();
+    }
+
+    setRainAudioVolume(value) {
+        this.params.rainAudioVolume = value;
+        if (this.rainAudio) {
+            this.rainAudio.volume = value;
+        }
+        this.updateRainAudioState();
+    }
+
+    updateRainAudioState() {
+        if (!this.rainAudio) return;
+
+        const shouldPlay = this.params.rainEnabled && this.params.rainAudioEnabled && this.params.rainAudioVolume > 0.001;
+        if (shouldPlay) {
+            this.rainAudio.volume = this.params.rainAudioVolume;
+            const playPromise = this.rainAudio.play();
+            if (playPromise?.catch) {
+                playPromise.catch(() => {});
+            }
+        } else {
+            this.rainAudio.pause();
+            this.rainAudio.currentTime = 0;
+        }
+    }
+
     setLightningEnabled(value) {
         this.params.lightningEnabled = value;
         if (!value) {
diff --git a/src/main.js b/src/main.js
index f19c042..121cb94 100644
--- a/src/main.js
+++ b/src/main.js
@@ -68,8 +68,10 @@ function setupControls(oceanScene) {
     bindSlider('rain-veil-intensity', (value) => value.toFixed(2), (value) => oceanScene.setRainVeilIntensity(value));
     bindSlider('rain-drop-size', (value) => value.toFixed(2), (value) => oceanScene.setRainDropSize(value));
     bindSlider('rain-speed', (value) => value.toFixed(2), (value) => oceanScene.setRainSpeed(value));
+    bindSlider('rain-audio-volume', (value) => value.toFixed(2), (value) => oceanScene.setRainAudioVolume(value));
     bindSlider('lightning-intensity', (value) => value.toFixed(2), (value) => oceanScene.setLightningIntensity(value));
     bindCheckbox('rain-enabled', (value) => oceanScene.setRainEnabled(value));
+    bindCheckbox('rain-audio-enabled', (value) => oceanScene.setRainAudioEnabled(value));
     bindCheckbox('lightning-enabled', (value) => oceanScene.setLightningEnabled(value));
 }