Tire hydroplaning is one of the main influencing factors of traffic accidents,and it has a strong influence on vehicle driving safety.The tire model of 205/55R16 is chosen as the research object,a deformed half tire domain for calculating the hydroplaning performance was built by virtual of Computational Fluid Dynamics(CFD),and the water flow field characteristics was simulated by the Gas-liquid Two-phase Flows.The results show that the predicting hydroplaning speed is in good consistency with the NASA hydroplaning equation.In order to improve tire tread pattern draining capacity,and inspired by the idea that bionic nonsmooth surfaces(BNSS)can reduce water flow resistance,the effect of bionic V-riblet non-smooth structure design parameters arranged in tire grooves surface on water displacement and flow resistance were analyzed.