Aiming at the color uniformity problem of laser projection,the lighting body is designed in this paper.By adding reflectors to increase the blue light path and shorten the green light path,and adding diffusers in different positions to reduce the color uniformity,the design of the overall laser projection display system is completed based on the design of the main lighting body.The laser display system is built through simulation to study the color homogeneity of the image formed by the three primary color light sources through different angles,types and positions of dynamic/static diffuser,and the experiment is carried out according to the simulation results.The simulation and experimental results show that the color is significantly reduced,the color is less than 0.01 and the illumination uniformity is more than 93% under the Diffuser 2 Gaussian 2° collocation,reaching the industry leading level.