diff --git a/frontend/src/components/TaskTree/TaskFlowView.tsx b/frontend/src/components/TaskTree/TaskFlowView.tsx
index 65e11c3..9c79e2b 100644
--- a/frontend/src/components/TaskTree/TaskFlowView.tsx
+++ b/frontend/src/components/TaskTree/TaskFlowView.tsx
@@ -28,7 +28,12 @@ function parseImages(s: any): string[] {
   if (typeof s === "string") { try { return JSON.parse(s); } catch { return []; } }
   return [];
 }
-function imageUrl(u: string) { if (!u) return ""; return u.startsWith("http") ? u : import.meta.env.VITE_API_BASE_URL + (u.startsWith("/") ? u : "/" + u); }
+function imageUrl(u: string) {
+  if (!u) return "";
+  if (u.startsWith("http")) return u;      // 绝对地址直接用
+  if (u.startsWith("/api/")) return u;     // 已是完整API路径，避免双重/api/v1前缀
+  return import.meta.env.VITE_API_BASE_URL + (u.startsWith("/") ? u : "/" + u);
+}
 
 const ALL_TASKS = new Set<TaskResponse>();
 function collectAll(tasks: TaskResponse[]) { tasks.forEach(t => { ALL_TASKS.add(t); if (t.child_tasks) collectAll(t.child_tasks); }); }