The research status and the features of the disc brakes of mine hoist were described. A kind of disc brake was designed. The hydraulic circuit of the braking system was chose two-way parallel oil supply and four oil cylinder brake. In one oil-way,a one-way throttle was set,making the oil-way brake slightly delayed,so two stage braking was achieved and work was more stable. This disc brake is normally closed,it is safe and reliable,sensitive in action and has flexible installation location. It is easy to use,adjust and maintain.