Abstract: In this paper, we propose a new lattice Boltzmann modelfor simulating the seismic pressure wave. By usingChapman-Enskog expansion and multi-scales technique, we obtained a serieslattice Boltzmann equations and conservation law in the time scale t_0 . Weselect simple equilibrium distribution functions to get moments for thepressure wave equations. Numerical simulations show this method can be usedto compute seismic pressure wave.