Abstract: Modern mining system for mining, Many security issues is still a problem. For mine hoist system,Is even more so. With today's hoist system to improve the degree of automation, the safety coefficient rises ceaselessly, but still have this or that security problems. Based on the hoist safety considerations and in other mining experience, we designed for hoist rope releasing protective system. The device can accurately, real time detection of hoist rope in the first run and stop when the state. In the hoist during operation, rope's loosing state, device through the wireless transmitting device transmits the data to the hoist control system to do the processing, to avoid accidents.