Metal-gradient-material laser-shock-forging composite additive manufacturing method and device

The invention discloses a metal-gradient-material laser-shock-forging composite additive manufacturing method and device. The method includes: gradually spraying multi-metal mixed powder, which changes according a preset mixing proportion curve, according to a 3D printing filling scanning path, using a heat source to fuse the metal mixed powder to form the cladding layers of a workpiece, and using shock waves induced by pulse laser to impact and forge the cladding layers; stacking the cladding layers layer by layer, and forming the workpiece. The metal-gradient-material laser-shock-forging composite additive manufacturing method and device has the advantages that the cladding layer forming using the heat source to fuse the mixed metal powder and the cladding layer impacting and forging using the pulse laser are performed at the same time and are coordinated to manufacture a metal part, shaping and reinforcing are completed in one step in an efficient and high-quality manner, defects such as air pores, non-fusion and shrinkage cavities of the cladding layers are eliminated, and part internal quality is increased.