diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 2daf2b2..2ab45ca 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -154,7 +154,7 @@ hg_scanner::hg_scanner(ScannerSerial serial, const char* dev_name, usb_io* io, i
 	, async_io_(false), is_white_0_(true), isremove_left_hole(false), isremove_right_hole(false), isremove_top_hole(false), isremove_low_hole(false)
 	, isremove_left_hole_threshold(0), isremove_right_hole_threshold(0), isremove_top_hole_threshold(0), isremove_low_hole_threshold(0)
 	, dump_usb_path_(""),  dump_img_(&hg_scanner::dump_image_empty)
-	,  memory_size_(4000/*USB+JPEG压缩及图像处理图队列，总共1GB*/), isx86_Advan_(true), stop_fatal_(SCANNER_ERR_OK), is_auto_paper_scan(false)
+	,  memory_size_(600/*USB+JPEG压缩及图像处理图队列，总共600MB*/), wait_mem_seconds_(60), isx86_Advan_(true), stop_fatal_(SCANNER_ERR_OK), is_auto_paper_scan(false)
 	, size_check(false), save_sleeptime_type_(false), is_checksum_strat_scan(false), is_cis_image(false)
 	, is_dpi_color_check(false), save_dpi_color_check_val(0.0f), is_auto_falt(false), HGVersion_mgr_(NULL), HGVersion_Init_(NULL)
 	, HGVersion_Islock_(NULL), HGVersion_Postlog_(NULL), HGVersion_Free_(NULL), Dynamicopen_HGVersion_pHandle_(NULL), pid_(pid), fetching_id_(-1), color_correction_(false)
@@ -183,13 +183,20 @@ hg_scanner::hg_scanner(ScannerSerial serial, const char* dev_name, usb_io* io, i
 		if (!mem.empty())
 		{
 			memory_size_ = std::stoi(mem);
-			VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Get the config file --->memory_size_ set is :%lld", memory_size_);
+			VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Get the config file --->memory_size_ set is :%lld\n", memory_size_);
 		}
+		mem = hg_log::ini_get("mem", "wait");
+		if (!mem.empty())
+		{
+			wait_mem_seconds_ = std::stoi(mem);
+			VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Get the config file --->wait_mem_seconds_ set is :%d\n", wait_mem_seconds_);
+		}
+
 		std::string adv  = hg_log::ini_get("cpu", "advanced");
 		if (!adv.empty())
 		{
 			isx86_Advan_ = adv == "0" ? false : true;
-			VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Get the config file --->isx86_Advan_ set is :%d", isx86_Advan_);
+			VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Get the config file --->isx86_Advan_ set is :%d\n", isx86_Advan_);
 		}
 		
 	if (hg_log::create_folder(final_path_.c_str()))
@@ -3508,18 +3515,23 @@ int hg_scanner::save_usb_data(std::shared_ptr<tiny_buffer> data)
 	}
 	else
 	{
-		int num = 0;
-		float Memoryusae = .0f;	// hg_log::GetAppMemoryUsage();;
+		if(wait_mem_seconds_ == -1)
+			std::this_thread::sleep_for(std::chrono::milliseconds(30 * 1000));
+
+		int num = 0, gap = 500, max_wait = wait_mem_seconds_ * 1000 / gap;
+		float mem0 = .0f, Memoryusae = .0f;	// hg_log::GetAppMemoryUsage();;
 		size_t	que_size = 0;
 		imgs_.Size(&que_size);
-		Memoryusae = que_size / 1024.0f / 1024.0f;
+		mem0 = que_size / 1024.0f / 1024.0f;
 		if (async_io_)
-			Memoryusae *= 10;
+			mem0 *= 10;
 		else
-			Memoryusae += final_imgs_.mem_usage() / 1024.0f / 1024.0f;
-		while (Memoryusae >= memory_size_ && !user_cancel_ && num < 20)//三个条件以防止卡死
+			mem0 += final_imgs_.mem_usage() / 1024.0f / 1024.0f;
+		Memoryusae = mem0;
+		while (Memoryusae >= memory_size_ && Memoryusae >= mem0 &&
+			!user_cancel_ && num < max_wait)//三个条件以防止卡死 + 取走一张图即可存入一张图的条件
 		{
-			std::this_thread::sleep_for(std::chrono::milliseconds(500));
+			std::this_thread::sleep_for(std::chrono::milliseconds(gap));
 			//Memoryusae = hg_log::GetAppMemoryUsage();
 			imgs_.Size(&que_size);
 			Memoryusae = que_size / 1024.0f / 1024.0f;
diff --git a/hgdriver/hgdev/hg_scanner.h b/hgdriver/hgdev/hg_scanner.h
index 6850662..3c1ee39 100644
--- a/hgdriver/hgdev/hg_scanner.h
+++ b/hgdriver/hgdev/hg_scanner.h
@@ -393,7 +393,8 @@ protected:
     unsigned int    usb_img_index_;
     unsigned int    final_img_index_;
     std::string     final_path_;
-    unsigned long long    memory_size_;
+    unsigned long   memory_size_;       // MB
+    unsigned long   wait_mem_seconds_;  // wait up to wait_mem_seconds_ if memory usage is great than memory_size_
     bool            isx86_Advan_;
     int             stop_fatal_;
     BlockingQueue<std::shared_ptr<tiny_buffer>> imgs_;