diff --git a/build/windows/HGScannerLib/HGScannerLib.def b/build/windows/HGScannerLib/HGScannerLib.def
index 86ae3f6e..e98ff05f 100644
--- a/build/windows/HGScannerLib/HGScannerLib.def
+++ b/build/windows/HGScannerLib/HGScannerLib.def
@@ -23,4 +23,5 @@ HGLib_DeviceIsPaperOn
 HGLib_DeviceRestart
 HGLib_DeviceShutDown
 HGLib_StartDeviceScan
-HGLib_StopDeviceScan
\ No newline at end of file
+HGLib_StopDeviceScan
+HGLib_StopDeviceScanAsyn
\ No newline at end of file
diff --git a/sdk/scannerlib/HGLibDeviceImpl.cpp b/sdk/scannerlib/HGLibDeviceImpl.cpp
index 2f4ab045..83f9ca29 100644
--- a/sdk/scannerlib/HGLibDeviceImpl.cpp
+++ b/sdk/scannerlib/HGLibDeviceImpl.cpp
@@ -1027,6 +1027,21 @@ HGBool HGLibDeviceImpl::StopScan()
 	return ret;
 }
 
+HGBool HGLibDeviceImpl::StopScanAsyn()
+{
+	HGBool ret = HGFALSE;
+
+	HGBase_EnterLock(m_lock);
+	if (m_scanning)
+	{
+		sane_cancel(m_devHandle);
+		ret = HGTRUE;
+	}
+	HGBase_LeaveLock(m_lock);
+
+	return ret;
+}
+
 const char* HGLibDeviceImpl::GetGroupName(HGUInt group)
 {
 	if (group > HGLIB_GROUP_NAME_PAPERFEEDING)
diff --git a/sdk/scannerlib/HGLibDeviceImpl.hpp b/sdk/scannerlib/HGLibDeviceImpl.hpp
index 9aa88b8f..6fc92e02 100644
--- a/sdk/scannerlib/HGLibDeviceImpl.hpp
+++ b/sdk/scannerlib/HGLibDeviceImpl.hpp
@@ -37,6 +37,7 @@ public:
 	HGBool StartScan(HGLibDeviceScanEventFunc eventFunc, HGPointer eventParam,
 		HGLibDeviceScanImageFunc imageFunc, HGPointer imageParam);
 	HGBool StopScan();
+	HGBool StopScanAsyn();
 
 private:
 	static const char* GetGroupName(HGUInt group);
diff --git a/sdk/scannerlib/HGScannerLib.cpp b/sdk/scannerlib/HGScannerLib.cpp
index 1d269c33..d53497b7 100644
--- a/sdk/scannerlib/HGScannerLib.cpp
+++ b/sdk/scannerlib/HGScannerLib.cpp
@@ -263,3 +263,14 @@ HGBool HGAPI HGLib_StopDeviceScan(HGLibDevice device)
 	HGLibDeviceImpl* deviceImpl = (HGLibDeviceImpl*)device;
 	return deviceImpl->StopScan();
 }
+
+HGBool HGAPI HGLib_StopDeviceScanAsyn(HGLibDevice device)
+{
+	if (NULL == device)
+	{
+		return HGFALSE;
+	}
+
+	HGLibDeviceImpl* deviceImpl = (HGLibDeviceImpl*)device;
+	return deviceImpl->StopScanAsyn();
+}
diff --git a/sdk/scannerlib/HGScannerLib.h b/sdk/scannerlib/HGScannerLib.h
index f89acd8f..1e850d94 100644
--- a/sdk/scannerlib/HGScannerLib.h
+++ b/sdk/scannerlib/HGScannerLib.h
@@ -507,4 +507,7 @@ HGEXPORT HGBool HGAPI HGLib_StartDeviceScan(HGLibDevice device, HGLibDeviceScanE
 /* ֹͣɨÃè */
 HGEXPORT HGBool HGAPI HGLib_StopDeviceScan(HGLibDevice device);
 
+/* ֹͣɨÃè-Òì²½ */
+HGEXPORT HGBool HGAPI HGLib_StopDeviceScanAsyn(HGLibDevice device);
+
 #endif /* __HGSCANNERLIB_H__ */
\ No newline at end of file