Abstract: In this paper the granular media in storage was supposed to be elasticperfectly plastic behaviour material submitting to MohrCoulomb yield criterion, and the friction effect between granular media and silo wall was supposed to be Coulomb friction contact problem. The contact element was set up. According to continuum theory, the static pressures on wall of silohopper combined storehouse were simulated by finite element method.Take static solution as initial condition,the dynamic pressure variations of silo wall and hopper wall in initial stages of discharge were studied by the method of given displacement.