Abstract: CFD software FLUENT 62 was used to simulate propane/air premixed combustion in packed bed with user-defined scalars and user-defined functions. The two-dimensional stabilized model and simple reaction mechanism were adopted. It is concluded that, because of the wall viscosity and wall heat loss, the flame of combustion in porous medium presents an obvious 2D structure. Consequently, it is important to consider the effects of wall in designing actual porous burners.