diff --git a/src/App.vue b/src/App.vue
index a1558b3..5c495c5 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,5 +1,10 @@
 <script setup lang="ts">
+import { ref } from 'vue'
 import { SplitLayout, SplitPanel } from './components'
+
+// 用于演示双向绑定的面板尺寸状态
+const leftPanelSize = ref(30)
+const rightPanelSize = ref(30)
 </script>
 
 <template>
@@ -75,6 +80,38 @@ import { SplitLayout, SplitPanel } from './components'
         </SplitPanel>
       </SplitLayout>
     </div>
+
+    <h2>响应式尺寸控制</h2>
+    <div class="control-panel">
+      <div class="control-item">
+        <label>左侧面板尺寸：</label>
+        <input type="number" v-model="leftPanelSize" min="10" max="90" step="1" />
+        <span>%</span>
+      </div>
+      <div class="control-item">
+        <label>右侧面板尺寸：</label>
+        <input type="number" v-model="rightPanelSize" min="10" max="90" step="1" />
+        <span>%</span>
+      </div>
+    </div>
+    <div class="demo-box">
+      <SplitLayout direction="horizontal">
+        <SplitPanel :size="leftPanelSize" :min-size="50">
+          <div class="SplitPanel-content">
+            <h3>左侧面板</h3>
+            <p>当前尺寸：{{ leftPanelSize }}%</p>
+            <p>通过上方输入框修改此面板尺寸</p>
+          </div>
+        </SplitPanel>
+        <SplitPanel :size="rightPanelSize">
+          <div class="SplitPanel-content">
+            <h3>右侧面板</h3>
+            <p>当前尺寸：{{ rightPanelSize }}%</p>
+            <p>通过上方输入框修改此面板尺寸</p>
+          </div>
+        </SplitPanel>
+      </SplitLayout>
+    </div>
   </div>
 </template>
 
@@ -114,4 +151,30 @@ h2 {
   margin-bottom: 10px;
   color: #1890ff;
 }
+
+.control-panel {
+  display: flex;
+  gap: 20px;
+  margin-bottom: 15px;
+  background-color: #f5f5f5;
+  padding: 15px;
+  border-radius: 4px;
+}
+
+.control-item {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.control-item input {
+  width: 60px;
+  padding: 5px;
+  border: 1px solid #d9d9d9;
+  border-radius: 2px;
+}
+
+.control-item label {
+  font-weight: 500;
+}
 </style>
diff --git a/src/components/SplitLayout.vue b/src/components/SplitLayout.vue
index d74f367..617b116 100644
--- a/src/components/SplitLayout.vue
+++ b/src/components/SplitLayout.vue
@@ -94,6 +94,29 @@ provide('splitter-context', {
       panes.value.splice(index, 1)
     }
   },
+  /**
+   * 更新面板尺寸方法
+   * 子组件在外部size属性变化时调用此方法更新面板尺寸
+   * @param index 面板在数组中的索引
+   * @param newSize 新的尺寸百分比
+   */
+  updatePaneSize: (index: number, newSize: number) => {
+    if (index >= 0 && index < panes.value.length) {
+      // 保存旧尺寸，用于计算差值
+      const oldSize = panes.value[index].size
+      // 更新面板尺寸
+      panes.value[index].size = newSize
+
+      // 重新计算所有面板尺寸，确保总和为100%
+      calculateSizes()
+
+      // 触发resize事件，将所有面板的最新尺寸信息传递给父组件
+      emit(
+        'resize',
+        panes.value.map((pane) => ({ id: pane.id, size: pane.size })),
+      )
+    }
+  },
 })
 
 /**
diff --git a/src/components/SplitPanel.vue b/src/components/SplitPanel.vue
index d92cac2..c735adc 100644
--- a/src/components/SplitPanel.vue
+++ b/src/components/SplitPanel.vue
@@ -5,7 +5,7 @@
  * 该组件作为SplitLayout的子组件，表示一个可调整大小的面板。
  * 通过provide/inject机制与SplitLayout父组件通信，实现面板的注册、尺寸计算和更新。
  */
-import { ref, inject, computed, onMounted, onBeforeUnmount, useId } from 'vue'
+import { ref, inject, computed, onMounted, onBeforeUnmount, useId, watch } from 'vue'
 
 // 定义组件属性
 const props = defineProps({
@@ -51,6 +51,7 @@ const splitterContext = inject('splitter-context') as {
   panes: { value: Array<{ id: string; size: number; minSize: number; maxSize: number }> }
   registerPane: (id: string, size: number, minSize: number, maxSize: number) => number
   unregisterPane: (index: number) => void
+  updatePaneSize: (index: number, newSize: number) => void
 }
 
 /**
@@ -97,6 +98,20 @@ onBeforeUnmount(() => {
   // 注销面板，传入索引值
   splitterContext.unregisterPane(paneIndex.value)
 })
+
+/**
+ * 监听size属性变化
+ * 当外部组件修改size值时，调用父组件的updatePaneSize方法更新面板尺寸
+ */
+watch(
+  () => props.size,
+  (newSize) => {
+    // 只有当面板已注册且size值有效时才更新
+    if (paneIndex.value >= 0 && newSize > 0) {
+      splitterContext.updatePaneSize(paneIndex.value, newSize)
+    }
+  },
+)
 </script>
 
 <template>