using drum winding wire rope or chain ascension or traction weight of small light lifting equipment, also known as the winch. Hoist can ascend vertically, Horizontal hoist could be divided into manual hoist and electric hoist. Now is given priority to electric hoist. It can be used alone, also can be lifting, road construction and mine lifting mechanical components, it is widely used due to the simple work, large amount of rope and displacement easily. Mainly used in construction, water conservancy, forestry, mining, port, etc material lifting or drag.