Abstract: Taking the UAV heat sink as the research object, the response surface method was used to study the optimization of laser selective melting forming. Firstly, by checking the exposure energy fraction and linear expansion coefficient of the material, then through the thermal-mechanical coupling analysis with Simufact Additive simulation software, the deformation and equivalent stress data of the model under different parameters were obtained. On this basis, the Box-Behnken response surface method was used to optimize the parameters, and the optimal combination was obtained as follows: laser power 206.732W, scanning speed 985.631mm/s, and powder layer thickness 0.085mm. Finally, the optimization effect was verified by printing experiments and 3D scanning. The results show that the maximum surface deformation of the optimized heat sink is about 0.3mm, which is significantly improved compared with the result before optimization.