The transient high temperature and water intrusion can easily lead to the degradation of thermodynamic behavior and braking performance of the brake system of heavy vehicles.To investigate the influence of surface texture on the thermodynamic behavior and tribological characteristics of brake systems,the thermodynamic analysis of the brake system was carried out based on the finite element method,and considering the extreme case of liquid lubrication in brake systems as a large amount of water intrusion,an improved lubrication analysis model of the textured brake system was established.The results show that the horizontal groove texture of the brake lining can make the temperature and stress distribution of the brake disc more uniform,thereby avoiding the occurrence of vehicle brake failure caused by local high temperature in the contact area.With the increase of the groove inclination angle,the load capacity increases and the friction coefficient decreases.For the different combination textures types,the cylindrical and ellipsoidal combined textures have the highest surface bearing capacity and the lowest friction coefficient,while the taper and ellipsoidal combined textures have the lowest surface bearing capacity and the highest friction coefficient.It is helpful to improve the working performance of the brake system in a heavy vehicle by constructing groove texture and combination texture on the brake lining surface.