diff --git a/cache/src/tango_cache_tools.h b/cache/src/tango_cache_tools.h
index 7874b9d..6cac7b8 100644
--- a/cache/src/tango_cache_tools.h
+++ b/cache/src/tango_cache_tools.h
@@ -6,6 +6,12 @@
 #define MESA_HANDLE_RUNTIME_LOGV2(handle, lv, fmt, args...)   \
     MESA_handle_runtime_log((handle), (lv), "TANGO_CACHE", "%s:%d, " fmt, __FILE__, __LINE__, ##args)
 
+#ifdef CACHE_DEBUG_SWITCH
+#define DBG_CACHE(msg...) do{printf(msg);}while(0)
+#else
+#define DBG_CACHE(msg...)
+#endif
+
 int Base64_EncodeBlock(const unsigned char *in, int inl, unsigned char *out);
 int Base64_DecodeBlock(const unsigned char *in, int inl, unsigned char *out, int outsize);
 
diff --git a/cache/src/tango_cache_transfer.cpp b/cache/src/tango_cache_transfer.cpp
index bf7eb20..5fb6398 100644
--- a/cache/src/tango_cache_transfer.cpp
+++ b/cache/src/tango_cache_transfer.cpp
@@ -138,6 +138,7 @@ static int http_put_bodypart_request_evbuf(struct tango_cache_ctx *ctx, bool ful
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
+	DBG_CACHE("http_put_bodypart_request_evbuf, state: %d, length: %lu, key: %s\n", ctx->put.state, ctx->put.upload_length, ctx->object_key);
 	return 1;
 }
 
@@ -196,6 +197,7 @@ int curl_get_minio_uploadID(struct tango_cache_ctx *ctx)
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
+	DBG_CACHE("curl_get_minio_uploadID, state: %d, key: %s\n", ctx->put.state, ctx->object_key);
 	return 1;
 }
 
@@ -293,6 +295,7 @@ bool cache_kick_combine_minio(struct tango_cache_ctx *ctx)
 
 	rc = curl_multi_add_handle(ctx->instance->multi_hd, ctx->curl);
 	assert(rc==CURLM_OK);
+	DBG_CACHE("cache_kick_combine_minio, state: %d, key: %s\n", ctx->put.state, ctx->object_key);
 	return true;
 }
 
@@ -354,6 +357,7 @@ int cache_kick_upload_minio_end(struct tango_cache_ctx *ctx)
 {
 	int ret = 0;
 
+	DBG_CACHE("cache_kick_upload_minio_end, state: %d, key: %s\n", ctx->put.state, ctx->object_key);
 	ctx->put.close_state = true;//仅设置状态，并非真正关闭；内部状态机轮转结束后再关闭
 	if(ctx->fail_state)
 	{
@@ -412,6 +416,7 @@ int cache_kick_upload_minio_end(struct tango_cache_ctx *ctx)
 
 void tango_cache_curl_put_done(struct tango_cache_ctx *ctx, CURLcode res, long res_code)
 {
+	DBG_CACHE("tango_cache_curl_put_done, state: %d, key: %s\n", ctx->put.state, ctx->object_key);
 	switch(ctx->put.state)
 	{
 		case PUT_STATE_WAIT_START: