diff --git a/apps/web/src/pages/generate/hooks/generate-video/buildPayload.ts b/apps/web/src/pages/generate/hooks/generate-video/buildPayload.ts
index 6040cf875..1c8595e30 100644
--- a/apps/web/src/pages/generate/hooks/generate-video/buildPayload.ts
+++ b/apps/web/src/pages/generate/hooks/generate-video/buildPayload.ts
@@ -63,7 +63,8 @@ export const buildEditPlanPayload = (props: UseGenerateVideoProps) => {
 export const validateGenerateInputs = (props: UseGenerateVideoProps): string | null => {
   const { titleSettings, materialMode, selectedMaterials, voiceMode, selectedClonedVoice } = props
 
-  if (!titleSettings.title.trim()) {
+  // AI 自动选择模式下，标题可以为空（后端会自行生成）
+  if (!titleSettings.aiAutoSelect && !titleSettings.title.trim()) {
     return "请先选择或输入标题"
   }
   if (materialMode === "manual" && selectedMaterials.length === 0) {