Hydraulic disc brake is the most widely used brake type nowadays. The heat transfer performance of brake disc has a key influence on reliability of brake. Considering dynamic convection heat transfer conditions, we deduce the surface heat transfer coefficient along radial direction according to the boundary layer theory. The heat transfer characteristics of disc brake are calculated based on the finite element method, and the three dimensional transient temperature field of the disc and change laws of node temperature within friction radius are obtained. It is proved by a bench test that considering wind dynamic factors can make the boundary conditions more accurate, and the prediction method of the heat transfer performance has a higher calculation precision.