diff --git a/backend/internal/modules/listing/presenter.go b/backend/internal/modules/listing/presenter.go
index b394718..aa6efe4 100644
--- a/backend/internal/modules/listing/presenter.go
+++ b/backend/internal/modules/listing/presenter.go
@@ -306,20 +306,34 @@ func centToYuan(value int64) float64 {
 func cleanScreenshotURLs(urls []string) []string {
 	cleaned := make([]string, 0, len(urls))
 	seen := make(map[string]struct{}, len(urls))
-	for _, url := range urls {
-		url = strings.TrimSpace(url)
-		if url == "" {
+	for _, fileURL := range urls {
+		fileURL = normalizeDefaultScreenshotURL(strings.TrimSpace(fileURL))
+		if fileURL == "" {
 			continue
 		}
-		if _, ok := seen[url]; ok {
+		if _, ok := seen[fileURL]; ok {
 			continue
 		}
-		seen[url] = struct{}{}
-		cleaned = append(cleaned, url)
+		seen[fileURL] = struct{}{}
+		cleaned = append(cleaned, fileURL)
 	}
 	return cleaned
 }
 
+// normalizeDefaultScreenshotURL 把历史默认图地址升级到当前版本，避免浏览器继续吃旧 SVG 缓存。
+func normalizeDefaultScreenshotURL(fileURL string) string {
+	if fileURL == "" {
+		return ""
+	}
+	switch {
+	case fileURL == "/api/listings/default-upload-screenshot",
+		strings.HasPrefix(fileURL, "/api/listings/default-upload-screenshot?"):
+		return defaultUploadScreenshot
+	default:
+		return fileURL
+	}
+}
+
 func firstScreenshotURL(urls []string) string {
 	if len(urls) == 0 {
 		return ""
diff --git a/backend/internal/modules/listing/service.go b/backend/internal/modules/listing/service.go
index 9c24f1d..a07dc06 100644
--- a/backend/internal/modules/listing/service.go
+++ b/backend/internal/modules/listing/service.go
@@ -47,7 +47,7 @@ const (
 	defaultFireLevelMin           = 38
 	defaultPublishCooldownMinutes = 5
 	maxExternalUploadItems        = 10
-	defaultUploadScreenshot       = "/api/listings/default-upload-screenshot"
+	defaultUploadScreenshot       = "/api/listings/default-upload-screenshot?v=webp1"
 )
 
 type PublishCooldownError struct {
diff --git a/frontend/src/features/admin/views/AdminListingReviewView.vue b/frontend/src/features/admin/views/AdminListingReviewView.vue
index 893d9dd..e2077ac 100644
--- a/frontend/src/features/admin/views/AdminListingReviewView.vue
+++ b/frontend/src/features/admin/views/AdminListingReviewView.vue
@@ -36,7 +36,7 @@ interface RiskItem {
   level: RiskLevel
 }
 
-const defaultScreenshotURL = '/api/listings/default-upload-screenshot'
+const defaultScreenshotURL = '/api/listings/default-upload-screenshot?v=webp1'
 const rejectReasonOptions = [
   '默认截图，需补充真实截图',
   '账号资产信息不完整',
@@ -451,7 +451,7 @@ function hasDefaultScreenshot(row: Listing) {
 }
 
 function isDefaultScreenshot(url: string) {
-  return url.includes(defaultScreenshotURL)
+  return url.includes('/api/listings/default-upload-screenshot')
 }
 
 function riskItems(row: Listing): RiskItem[] {