Impulsive wave generated by high-speed landslide on reservoir bank often result in serious disasters.At first,a sliding block model is developed for predicting the movement of high-speed landslide,while the fluid movement is solved by SPH(smoothed particle hydrodynamics)method in accordance with the incompressible continuity equation and Navier-Stokes equation.Then the basic principle,kernel function,discretization scheme and boundary treatments are introduced.Coupled with landslide and fluid movement,the SPH model is developed to simulate impulse wave.The initial impulsive wave height and climbing height are compared with those by other methods.Results show that the model can simulate the movement of waves generated by high-speed landslide,and the SPH method can well simulate the mechanics problems with instantly large deformation.