Based on the of theory heat conduction and thermal-elasticity,simulated the braking process of mine hoist. The changing laws of the boundary condition on the brake disc’s surface during braking were analyzed and the computing method of the convective coefficient was discussed emphatically. According to variable material properties and the actual dimension of brake disk,a 3-dimensional cycle-symmetric model of brake disk in mine hoist was established and the temperature and thermal stress distribution was researched under the different braking conditions. The article discussed the calculation method considering thermal stress,and analyzed and compared each method’s advantage with disadvantage. The results indicate that the temperature and stress distribution of brake disk are closely related to the braking initial velocity and braking acceleration. The simulation provides an important reference for the optimization of lifting speed and braking acceleration,and the design and development of high-performance brake system.