Based on the short-wave (532 nm) nanosecond pulse laser, this article explores the influence of several pulse laser processing parameters (such as peak power, single pulse energy, overlap rate, scanning angle) on the molding process of metal 3D printing technology, and preliminarily studies the process method of multi-material coating based on pulse laser. Compared with continuous laser metal 3D printing, this research finds that the shock wave phenomenon of pulse laser can significantly improve the structure morphology of 3D printing parts; It can realize bonding of multiple materials by versus of laser etching the micro-nano structure on the substrate surface.