The clean room crane is a kind of lifting equipment used in a dust-free environment. The environment of the paper mill is high temperature, humid and paper powder is flying. With 24 hours of non-stop operation, the environmental conditions of the equipment are very harsh. In addition, the production stoppage due to the malfunction of the machine can cause losses to the business. Therefore, the equipment used in the paper industry must have excellent operability and productivity required in a severe environment, and also need to have stability that does not cause frequent failures. The clean hoist meets the rigid requirements of the papermaking workshop and determines the safe production of the workshop.