Abstract: Aiming at the problems for high productivity deep well hoist of large operating load, high frequency of tightening rope and rope replacement, long occupation time of conventional rope adjustment, insufficient clamping force of manipulator and so on, the rope adjustment device and process of self balanced lifting multi rope friction hoist are proposed and optimized according to double wedge rope clamping principle and hydraulic clamping technology. Through the application in the wire rope replacement of auxiliary shaft hoist in Maiduoshan coal mine, it was proved that 96 hours of a single rope replacement time and RMB194,500.00 yuan of labor cost can be saved. The improved device has the advantages of simple, safe, fast and efficient rope changing process.