diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 490b789..a3438b1 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -3969,6 +3969,10 @@ int hg_scanner::device_io_control(unsigned long code, void* data, unsigned* len)
 	}
 	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
 }
+int hg_scanner::get_roller_life(void)
+{
+	return 150000;
+}
 int hg_scanner::discard_all_images(void)
 {
 	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
diff --git a/hgdriver/hgdev/hg_scanner.h b/hgdriver/hgdev/hg_scanner.h
index 4491386..5f62ac0 100644
--- a/hgdriver/hgdev/hg_scanner.h
+++ b/hgdriver/hgdev/hg_scanner.h
@@ -446,6 +446,8 @@ public:
     virtual int reset(void);
     virtual int device_io_control(unsigned long code, void* data, unsigned* len);
     virtual int discard_all_images(void) = 0;
+    virtual int get_roller_life(void);  // 获取滚轴最大寿命
+
 public:
 	hg_scanner(ScannerSerial serial, const char* dev_name, usb_io* io,int pid);
 	virtual ~hg_scanner();
diff --git a/hgdriver/hgdev/hg_scanner_200.cpp b/hgdriver/hgdev/hg_scanner_200.cpp
index 6269084..d6a89ba 100644
--- a/hgdriver/hgdev/hg_scanner_200.cpp
+++ b/hgdriver/hgdev/hg_scanner_200.cpp
@@ -131,6 +131,10 @@ int hg_scanner_200::discard_all_images(void)
 	discard_prev();
 	return SCANNER_ERR_OK;
 }
+int hg_scanner_200::get_roller_life(void)
+{
+	return 450000;
+}
 void hg_scanner_200::thread_handle_usb_read(void)
 {
 	int		ret = SCANNER_ERR_OK,
diff --git a/hgdriver/hgdev/hg_scanner_200.h b/hgdriver/hgdev/hg_scanner_200.h
index 707508b..b115ea4 100644
--- a/hgdriver/hgdev/hg_scanner_200.h
+++ b/hgdriver/hgdev/hg_scanner_200.h
@@ -26,6 +26,8 @@ protected:
 	virtual void thread_handle_usb_read(void) override;
 	virtual int on_scanner_closing(bool force) override;
 	virtual int discard_all_images(void) override;
+	virtual int get_roller_life(void) override;
+
 protected:
 	virtual int on_color_mode_changed(int& color_mode) override; // COLOR_MODE_xxx
 	virtual int on_paper_changed(int& paper) override;           // PAPER_xxx
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 6dd0803..6307ceb 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -762,6 +762,10 @@ int hg_scanner_239::discard_all_images(void)
 		VLOG_MINI_2(LOG_LEVEL_DEBUG_INFO, "prev-connection has left %d interrupt packet(s) && %d image(s).\n", pre_int, pre_img);
 	return 0;
 }
+int hg_scanner_239::get_roller_life(void)
+{
+	return 450000;
+}
 int hg_scanner_239::on_color_mode_changed(int& color_mode)
 {
 
diff --git a/hgdriver/hgdev/hg_scanner_239.h b/hgdriver/hgdev/hg_scanner_239.h
index 15599bd..d602dc6 100644
--- a/hgdriver/hgdev/hg_scanner_239.h
+++ b/hgdriver/hgdev/hg_scanner_239.h
@@ -83,6 +83,7 @@ public:
 	virtual int stop(void) override;
 	virtual int reset(void) override;
 	virtual int device_io_control(unsigned long code, void* data, unsigned* len) override;
+	virtual int get_roller_life(void) override;
 
 public:
 	//////////////固定的硬件信息设置或获取//////////////
diff --git a/hgdriver/hgdev/hg_scanner_300.cpp b/hgdriver/hgdev/hg_scanner_300.cpp
index caf6469..c76e6ba 100644
--- a/hgdriver/hgdev/hg_scanner_300.cpp
+++ b/hgdriver/hgdev/hg_scanner_300.cpp
@@ -301,6 +301,10 @@ int hg_scanner_300::discard_all_images(void)
 	}
 	return SCANNER_ERR_OK;
 }
+int hg_scanner_300::get_roller_life(void)
+{
+	return pid_ == 300 ? 150000 : 200000;
+}
 int hg_scanner_300::start(void)
 {
 	bool	handled = false;
diff --git a/hgdriver/hgdev/hg_scanner_300.h b/hgdriver/hgdev/hg_scanner_300.h
index 2c29002..446b071 100644
--- a/hgdriver/hgdev/hg_scanner_300.h
+++ b/hgdriver/hgdev/hg_scanner_300.h
@@ -26,6 +26,8 @@ protected:
 	virtual int  on_scanner_closing(bool force) override;
 	virtual void thread_handle_usb_read(void) override;
 	virtual int discard_all_images(void) override;
+	virtual int get_roller_life(void) override;
+
 protected:
 	virtual	int  on_color_mode_changed(int& color_mode) override;	//颜色切换
 	virtual int  on_paper_changed(int& paper) override;				//纸张大小设置
diff --git a/hgdriver/hgdev/hg_scanner_302.cpp b/hgdriver/hgdev/hg_scanner_302.cpp
index 3c73a0e..b291256 100644
--- a/hgdriver/hgdev/hg_scanner_302.cpp
+++ b/hgdriver/hgdev/hg_scanner_302.cpp
@@ -1,4 +1,4 @@
-#include "hg_scanner_302.h"
+#include "hg_scanner_302.h"
 #include "../wrapper/hg_log.h"
 #include "filetools.h"
 
@@ -94,7 +94,7 @@ namespace settings302
 		{200.0f, 1},
 		{240.0f, 1},
 		{300.0f, 0},
-		{600.0f, 1} //临时版本发1  原来发2
+		{600.0f, 1} //临时版本�?  原来�?
 	};
 	bool is_equal(float l, float r)
 	{
@@ -668,6 +668,10 @@ int hg_scanner_302::discard_all_images(void)
 		VLOG_MINI_2(LOG_LEVEL_DEBUG_INFO, "prev-connection has left %d interrupt packet(s) && %d image(s).\n", pre_int, pre_img);
 	return 0;
 }
+int hg_scanner_302::get_roller_life(void)
+{
+	return pid_ == 302 ? 150000 : 200000;
+}
 int hg_scanner_302::on_color_mode_changed(int& color_mode)
 {
 
@@ -755,7 +759,7 @@ int hg_scanner_302::on_paper_check_changed(bool& check)
 }
 int hg_scanner_302::on_resolution_changed(int& dpi)
 {
-	dev_conf_.params_3399.dpi = 1;  //dpi 华凌cis和敦南cis 默认发1无需改变
+	dev_conf_.params_3399.dpi = 1;  //dpi 华凌cis和敦南cis 默认�?无需改变
 	int	ret = writedown_device_configuration();
 	return ret;
 }
@@ -1178,11 +1182,11 @@ std::string hg_scanner_302::get_ip(void)
 
 int hg_scanner_302::set_clear_roller_num(void)
 {
-	std::lock_guard<std::mutex>      lock(io_lock_);
-	int val = 0,
-		ret = read_register(setting3399::SR_CLR_ROLLER_NUM, &val);
+	//std::lock_guard<std::mutex>      lock(io_lock_);
+	//int val = 0,
+	//	ret = read_register(setting3399::SR_CLR_ROLLER_NUM, &val);
 
-	return ret;
+	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
 }
 int hg_scanner_302::set_clear_history_num(void)
 {
@@ -1269,7 +1273,7 @@ int hg_scanner_302::get_scan_is_sleep(SANE_Bool& type)
 {
 	std::lock_guard<std::mutex>      lock(io_lock_);
 	int ret = 0, val;
-	ret = read_register(setting3399::SR_GET_SLEEP_STAUTUS, &val); //0休眠  1唤醒状态
+	ret = read_register(setting3399::SR_GET_SLEEP_STAUTUS, &val); //0休眠  1唤醒状�?
 	if (ret == SCANNER_ERR_OK)
 	{
 		type = val == 1 ? true : false;
diff --git a/hgdriver/hgdev/hg_scanner_302.h b/hgdriver/hgdev/hg_scanner_302.h
index 19de1d7..20879a3 100644
--- a/hgdriver/hgdev/hg_scanner_302.h
+++ b/hgdriver/hgdev/hg_scanner_302.h
@@ -53,6 +53,8 @@ class hg_scanner_302 : public hg_scanner
 
 	int read_one_image_from_usb(SANE_Image_Statu statu = SANE_Image_Statu_OK);
 	virtual int discard_all_images();
+	virtual int get_roller_life(void) override;
+
 protected:
 	virtual void on_device_reconnected(void) override;
 	virtual int  on_scanner_closing(bool force) override;
diff --git a/hgdriver/hgdev/scanner_manager.cpp b/hgdriver/hgdev/scanner_manager.cpp
index cc2d516..56ef697 100644
--- a/hgdriver/hgdev/scanner_manager.cpp
+++ b/hgdriver/hgdev/scanner_manager.cpp
@@ -380,7 +380,7 @@ void hg_scanner_mgr::on_hgscanner_pnp(usb_event ev, libusb_device* device, int v
             size_t i = 0;
             for (; i < online_devices_.size(); ++i)
             {
-                if (online_devices_[i].dev == device)   // 此处假定同一台设备重新连接后，设备对象“device”保持不变；如果假设不成立，会导致设备重连消息不能正常接收，绑定到该设备的scanner对象得不到释放
+                if (online_devices_[i].dev == device)   // 此处假定同一台设备重新连接后，设备对象“device”保持不变；如果假设不成立，会导致设备重连消息不能正常接收，绑定到该设备的scanner对象得不到释�?
                 {
                     online_devices_[i].ind = index;
                     add = false;
@@ -895,6 +895,20 @@ scanner_err hg_scanner_mgr::hg_scanner_get_parameter(scanner_handle h, const cha
         if (strcmp(SANE_STD_OPT_NAME_LOGIN, name) == 0 ||
             strcmp(SANE_STD_OPT_NAME_LOGOUT, name) == 0)
             return SCANNER_ERR_DEVICE_NOT_SUPPORT;
+
+        if (strcmp(SANE_STD_OPT_NAME_ROLLER_LIFE, name) == 0)
+        {
+            if (*len < sizeof(SANE_Int))
+            {
+                *len = sizeof(SANE_Int);
+
+                return SCANNER_ERR_INSUFFICIENT_MEMORY;
+            }
+
+            *(SANE_Int*)data = SCAN_PTR(h)->get_roller_life();
+
+            return SCANNER_ERR_OK;
+        }
     }
 
     int l = *len,
diff --git a/hgsane/sane_hg_mdw.cpp b/hgsane/sane_hg_mdw.cpp
index 0b01482..ab06974 100644
--- a/hgsane/sane_hg_mdw.cpp
+++ b/hgsane/sane_hg_mdw.cpp
@@ -393,6 +393,7 @@ namespace local_utility
 		FIX_ID_TO_NAME(FIRMWARE_VERSION, 255);
 		FIX_ID_TO_NAME(DEVICE_IP_ADDR, 255);
 		FIX_ID_TO_NAME(DEVICE_MAC_ADDR, 255);
+		FIX_ID_TO_NAME(ROLLER_LIFE, sizeof(SANE_Int));
 
 		FIX_ID_TO_NAME(CUSTOM_GAMMA, sizeof(SANE_Gamma));