diff --git a/internal/shared/pdf/pdf_cache_manager.go b/internal/shared/pdf/pdf_cache_manager.go
index bcd304b..8f1ae83 100644
--- a/internal/shared/pdf/pdf_cache_manager.go
+++ b/internal/shared/pdf/pdf_cache_manager.go
@@ -35,9 +35,17 @@ type CacheInfo struct {
 
 // NewPDFCacheManager 创建PDF缓存管理器
 func NewPDFCacheManager(logger *zap.Logger, cacheDir string, ttl time.Duration, maxSize int64) (*PDFCacheManager, error) {
-	// 如果缓存目录为空，使用默认目录
+	// 如果缓存目录为空，使用项目根目录的storage/component-reports/cache目录
 	if cacheDir == "" {
-		cacheDir = filepath.Join(os.TempDir(), "tyapi_pdf_cache")
+		// 获取当前工作目录并构建项目根目录路径
+		wd, err := os.Getwd()
+		if err != nil {
+			// 如果获取工作目录失败，回退到临时目录
+			cacheDir = filepath.Join(os.TempDir(), "tyapi_pdf_cache")
+		} else {
+			// 构建项目根目录下的storage/component-reports/cache路径
+			cacheDir = filepath.Join(wd, "storage", "component-reports", "cache")
+		}
 	}
 
 	// 确保缓存目录存在
@@ -60,7 +68,6 @@ func NewPDFCacheManager(logger *zap.Logger, cacheDir string, ttl time.Duration,
 		zap.Duration("ttl", ttl),
 		zap.Int64("max_size", maxSize),
 	)
-
 	return manager, nil
 }