diff --git a/src/api/market.ts b/src/api/market.ts
index e38c58b..39f1bc7 100644
--- a/src/api/market.ts
+++ b/src/api/market.ts
@@ -37,6 +37,26 @@ export async function pmOrderPlace(
   return post<ApiResponse>('/clob/gateway/submitOrder', data, config)
 }
 
+/**
+ * 取消订单请求体（/clob/gateway/cancelOrder）
+ */
+export interface ClobCancelOrderRequest {
+  orderID: number
+  tokenID: string
+  userID: number
+}
+
+/**
+ * POST /clob/gateway/cancelOrder
+ * 取消订单，需鉴权
+ */
+export async function pmCancelOrder(
+  data: ClobCancelOrderRequest,
+  config?: { headers?: Record<string, string> }
+): Promise<ApiResponse> {
+  return post<ApiResponse>('/clob/gateway/cancelOrder', data, config)
+}
+
 /**
  * Split 请求体（/PmMarket/split）
  * 用 USDC 兑换该市场的 Yes+No 份额（1 USDC ≈ 1 Yes + 1 No）
diff --git a/src/views/Wallet.vue b/src/views/Wallet.vue
index 016d69d..efc9f9a 100644
--- a/src/views/Wallet.vue
+++ b/src/views/Wallet.vue
@@ -260,7 +260,7 @@
                 <div class="order-mobile-price">{{ ord.price }} • {{ ord.total }}</div>
               </div>
               <div class="order-mobile-right">
-                <v-btn icon variant="text" size="small" class="order-cancel-icon" color="error" @click.stop="cancelOrder(ord.id)">
+                <v-btn icon variant="text" size="small" class="order-cancel-icon" color="error" :disabled="cancelOrderLoading" @click.stop="cancelOrder(ord)">
                   <v-icon size="20">mdi-close</v-icon>
                 </v-btn>
                 <div class="order-mobile-filled">{{ ord.filledDisplay || ord.filled }}</div>
@@ -297,7 +297,7 @@
                 <td>{{ ord.total }}</td>
                 <td>{{ ord.expiration }}</td>
                 <td class="text-right">
-                  <v-btn variant="text" size="small" color="error" @click="cancelOrder(ord.id)">Cancel</v-btn>
+                  <v-btn variant="text" size="small" color="error" :disabled="cancelOrderLoading" @click="cancelOrder(ord)">Cancel</v-btn>
                 </td>
               </tr>
             </tbody>
@@ -442,6 +442,10 @@
         </v-card-actions>
       </v-card>
     </v-dialog>
+
+    <v-snackbar v-model="showCancelError" color="error" :timeout="4000">
+      {{ cancelOrderError }}
+    </v-snackbar>
   </v-container>
 </template>
 
@@ -453,6 +457,7 @@ import type { ECharts } from 'echarts'
 import DepositDialog from '../components/DepositDialog.vue'
 import WithdrawDialog from '../components/WithdrawDialog.vue'
 import { useUserStore } from '../stores/user'
+import { pmCancelOrder } from '../api/market'
 
 const { mobile } = useDisplay()
 const userStore = useUserStore()
@@ -521,6 +526,9 @@ interface OpenOrder {
   filledDisplay?: string
   iconChar?: string
   iconClass?: string
+  /** 取消订单 API 用 */
+  orderID?: number
+  tokenID?: string
 }
 interface HistoryItem {
   id: string
@@ -597,6 +605,7 @@ const positions = ref<Position[]>([
     outcomeWord: 'Yes',
   },
 ])
+const MOCK_TOKEN_ID = '59966088656508531737144108943848781534186324373509174641856486864137458635937'
 const openOrders = ref<OpenOrder[]>([
   {
     id: 'o1',
@@ -611,9 +620,33 @@ const openOrders = ref<OpenOrder[]>([
     filledDisplay: '0/5',
     iconChar: '₿',
     iconClass: 'position-icon-btc',
+    orderID: 5,
+    tokenID: MOCK_TOKEN_ID,
+  },
+  {
+    id: 'o2',
+    market: 'Will Bitcoin hit $100k by end of 2025?',
+    side: 'Yes',
+    outcome: 'Yes',
+    price: '70¢',
+    filled: '0',
+    total: '$70',
+    expiration: 'Dec 31, 2025',
+    orderID: 5,
+    tokenID: MOCK_TOKEN_ID,
+  },
+  {
+    id: 'o3',
+    market: 'Will ETH merge complete by Q3?',
+    side: 'No',
+    outcome: 'No',
+    price: '52¢',
+    filled: '25',
+    total: '$26',
+    expiration: 'Sep 30, 2025',
+    orderID: 5,
+    tokenID: MOCK_TOKEN_ID,
   },
-  { id: 'o2', market: 'Will Bitcoin hit $100k by end of 2025?', side: 'Yes', outcome: 'Yes', price: '70¢', filled: '0', total: '$70', expiration: 'Dec 31, 2025' },
-  { id: 'o3', market: 'Will ETH merge complete by Q3?', side: 'No', outcome: 'No', price: '52¢', filled: '25', total: '$26', expiration: 'Sep 30, 2025' },
 ])
 const history = ref<HistoryItem[]>([
   {
@@ -707,8 +740,42 @@ function onPageChange() {
   // 可选：翻页后滚动到表格顶部
 }
 
-function cancelOrder(id: string) {
-  openOrders.value = openOrders.value.filter((o) => o.id !== id)
+const cancelOrderLoading = ref(false)
+const cancelOrderError = ref('')
+const showCancelError = ref(false)
+async function cancelOrder(ord: OpenOrder) {
+  const orderID = ord.orderID ?? 5
+  const tokenID = ord.tokenID ?? MOCK_TOKEN_ID
+  const uid = userStore.user?.id ?? userStore.user?.ID
+  const userID = uid != null ? Number(uid) : 0
+  if (!Number.isFinite(userID) || userID <= 0) {
+    cancelOrderError.value = '请先登录'
+    showCancelError.value = true
+    return
+  }
+  const headers = userStore.getAuthHeaders()
+  if (!headers) {
+    cancelOrderError.value = '请先登录'
+    showCancelError.value = true
+    return
+  }
+  cancelOrderLoading.value = true
+  cancelOrderError.value = ''
+  try {
+    const res = await pmCancelOrder({ orderID, tokenID, userID }, { headers })
+    if (res.code === 0 || res.code === 200) {
+      openOrders.value = openOrders.value.filter((o) => o.id !== ord.id)
+      userStore.fetchUsdcBalance()
+    } else {
+      cancelOrderError.value = res.msg || '取消失败'
+      showCancelError.value = true
+    }
+  } catch (e) {
+    cancelOrderError.value = e instanceof Error ? e.message : 'Request failed'
+    showCancelError.value = true
+  } finally {
+    cancelOrderLoading.value = false
+  }
 }
 
 function cancelAllOrders() {