For the problem that the severe head injuries to the pedestrians are caused by collisions between car engine hood outer plate and pedestrian, the area with high probability of collision between a certain engine hood outer plate and pedestrian head was analyzed，and a uniform distributed mesh design was implemented to reduce its stiffness and achieve the protection for the pedestrian head to a certain extent. At the same time, considering the sealing  need for the outer cover of engine hood outer plates, a rubber film was applied to stick the opening parts to ensure their actual usage needs. Firstly, the preliminary scheme for mesh design was established by tensile performance test of sheet metal. Then, the die surface of stamping die for the original solid sheet metal was modified to ensure that the stamped products with perforated sheet metal could meet the design requirements. Finally, software Autoform was used for springback compensation and iterative optimization, and the die surface of compensated tool body was fitted by software Think-design to realize that the stamped products with perforated sheet metal could meet the design requirements and the final product could meet its accuracy requirements on the inspection fixture.