The effect of the protective wall's shape on the shock wave of2-D explosive field is studied. Under the condition that the outside force, the outside resources and the heat exchange are ignored, the partial differential conservation equations of the compressible fluid are given by adopting the fluid model. The “and” splitting scheme to calculate the transport step by using the multi-material in cell(MMIC) method is adopted. At the same time, for the detonation products, the JWL state equation is adopted, and the air is approximately regarded as the ideal gas. Accordingly the effects of the shapes of the protective wall's both sides on the shock wave are obtained, and the relations between them are listed in the paper. So it can be obtained that the shape of the edge near to the explosive center of the protective wall affects the shock wave more obviously.