It is a light and small hoisting equipment, also known as electric winch, which uses winding wire rope or chain to lift or pull heavy objects. The electric winch can lift the weight vertically, horizontally or obliquely. The electric winch is divided into manual winch, electric winch and hydraulic winch. Mainly electric winch. It can be used alone or as a component of hoisting, road building and mine hoisting machinery. It is widely used because of its simple operation, large amount of rope winding and convenient relocation. It is mainly used in building, water conservancy engineering, forestry, mining, wharf, etc.