diff --git a/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/report/ReportController.java b/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/report/ReportController.java
index 80250fd..357686c 100644
--- a/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/report/ReportController.java
+++ b/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/report/ReportController.java
@@ -4,11 +4,18 @@ import cn.craftlabs.platform.api.service.ReportService;
 import cn.craftlabs.platform.api.web.dto.CallbackStatsResponse;
 import cn.craftlabs.platform.api.web.dto.ContractSnReportRow;
 import cn.craftlabs.platform.api.web.dto.ProjectHealthRow;
+import org.springframework.core.io.ByteArrayResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.nio.charset.StandardCharsets;
+import java.time.LocalDate;
 import java.util.List;
 
 @RestController
@@ -39,4 +46,27 @@ public class ReportController {
     public List<ProjectHealthRow> getProjectHealth() {
         return reportService.getProjectHealth();
     }
+
+    @GetMapping("/export")
+    public ResponseEntity<Resource> exportReport(
+            @RequestParam String type,
+            @RequestParam(required = false) Long projectId,
+            @RequestParam(required = false) Long contractId) {
+
+        String csv = reportService.exportReport(type, projectId, contractId);
+
+        byte[] bytes = csv.getBytes(StandardCharsets.UTF_8);
+        byte[] bom = {(byte) 0xEF, (byte) 0xBB, (byte) 0xBF};
+        byte[] withBom = new byte[bom.length + bytes.length];
+        System.arraycopy(bom, 0, withBom, 0, bom.length);
+        System.arraycopy(bytes, 0, withBom, bom.length, bytes.length);
+
+        ByteArrayResource resource = new ByteArrayResource(withBom);
+
+        return ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION,
+                        "attachment; filename=report-" + type + "-" + LocalDate.now() + ".csv")
+                .contentType(MediaType.parseMediaType("text/csv; charset=utf-8"))
+                .body(resource);
+    }
 }
diff --git a/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/service/ReportService.java b/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/service/ReportService.java
index 6c62a15..317946e 100644
--- a/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/service/ReportService.java
+++ b/services/delivery-platform-api/src/main/java/cn/craftlabs/platform/api/service/ReportService.java
@@ -162,6 +162,35 @@ public class ReportService {
         }).collect(Collectors.toList());
     }
 
+    public String exportReport(String type, Long projectId, Long contractId) {
+        StringBuilder sb = new StringBuilder();
+
+        if ("contract-sn".equals(type)) {
+            sb.append("合同名称,客户,行项,应发,实发,已激活,缺口,状态\n");
+            List<ContractSnReportRow> rows = getContractSnReport(projectId, contractId);
+            for (ContractSnReportRow r : rows) {
+                sb.append(escapeCsv(r.getContractTitle())).append(",");
+                sb.append(escapeCsv(r.getCustomerName())).append(",");
+                sb.append(escapeCsv(r.getLineItemName())).append(",");
+                sb.append(r.getExpectedCount()).append(",");
+                sb.append(r.getIssuedCount()).append(",");
+                sb.append(r.getActivatedCount()).append(",");
+                sb.append(r.getGapCount()).append(",");
+                sb.append(escapeCsv(r.getStatus())).append("\n");
+            }
+        }
+
+        return sb.toString();
+    }
+
+    private String escapeCsv(String value) {
+        if (value == null) return "";
+        if (value.contains(",") || value.contains("\"") || value.contains("\n")) {
+            return "\"" + value.replace("\"", "\"\"") + "\"";
+        }
+        return value;
+    }
+
     private String resolveCustomerName(Long customerId) {
         if (customerId == null) {
             return null;
diff --git a/web/delivery-platform-ui/src/api/platform.js b/web/delivery-platform-ui/src/api/platform.js
index f680555..a90a44e 100644
--- a/web/delivery-platform-ui/src/api/platform.js
+++ b/web/delivery-platform-ui/src/api/platform.js
@@ -373,6 +373,9 @@ export function updateNotificationConfig(body) {
 export function getContractSnReport(params) {
   return axios.get('/api/v1/reports/contract-sn', { params });
 }
+export function exportReport(params) {
+  return axios.get('/api/v1/reports/export', { params, responseType: 'blob' });
+}
 export function getCallbackStats(params) {
   return axios.get('/api/v1/reports/callback-stats', { params });
 }
diff --git a/web/delivery-platform-ui/src/views/ContractSnReportView.vue b/web/delivery-platform-ui/src/views/ContractSnReportView.vue
index 1c847ae..a78847f 100644
--- a/web/delivery-platform-ui/src/views/ContractSnReportView.vue
+++ b/web/delivery-platform-ui/src/views/ContractSnReportView.vue
@@ -4,6 +4,7 @@
       <div class="toolbar">
         <span class="title">合同 SN 报表</span>
         <div class="actions">
+          <el-button @click="handleExport" :loading="exporting">导出 CSV</el-button>
           <el-button type="primary" :loading="loading" @click="load">刷新</el-button>
         </div>
       </div>
@@ -49,11 +50,12 @@
 import { ref, reactive, onMounted } from "vue";
 import { ElMessage } from "element-plus";
 import { useAuthStore } from "../stores/auth";
-import { getContractSnReport } from "../api/platform";
+import { getContractSnReport, exportReport } from "../api/platform";
 import { apiErrorMessage } from "../utils/apiErrorMessage";
 
 const auth = useAuthStore();
 const loading = ref(false);
+const exporting = ref(false);
 const rows = ref([]);
 const kpi = reactive({ totalLineItems: 0, totalIssued: 0, totalActivated: 0, totalGap: 0 });
 
@@ -83,6 +85,25 @@ async function load() {
     loading.value = false;
   }
 }
+
+async function handleExport() {
+  exporting.value = true
+  try {
+    const response = await exportReport({ type: 'contract-sn' })
+    const url = window.URL.createObjectURL(new Blob([response.data]))
+    const link = document.createElement('a')
+    link.href = url
+    link.setAttribute('download', `contract-sn-report-${new Date().toISOString().slice(0, 10)}.csv`)
+    document.body.appendChild(link)
+    link.click()
+    document.body.removeChild(link)
+    window.URL.revokeObjectURL(url)
+  } catch (e) {
+    ElMessage.error('导出失败')
+  } finally {
+    exporting.value = false
+  }
+}
 </script>
 
 <style scoped>