The pedestrian lower leg protection is an important issue in a vehicle design. Compared with the vehicle collision, the pedestrian protection collision energy is smaller, and the geometrical characteristics of the lower leg of the pedestrian will have great influence on the collision result. In this paper, the factors affecting the lower leg protection are analyzed, a design is proposed and validated with an example, in a test-correlated lower leg impact simulation. Calculation and analysis results show that by fine-tuning vehicle's shape and the structure design a good pedestrian leg protection design can be realized.