Abstract: Aiming at the problems lying in hoist’s load control system of mine, the paper presented a new definite-loading control system of hoist. It utilized hydraulic press transducer and adopted PLC as the core of the system, which realized no electrical quantity at measure point. In the design process, the essential safety and self-diagnostic functions of the system were fully considered, which solved the defect of low reliability in similar system at a certain extent. This system gains good effect in practical application, and can satisfy the demand of long-time running underground mine.