The invention discloses a 3D printing material with diamond light sensation and a preparation method of the 3D printing material. The 3D printing material comprises the following components in parts by mass: 75-99 parts of a plastic raw material, 10-20 parts of glass-coated silver powder, 2-10 parts of a toughening agent, 2-5 parts of a compatilizer and 0.1-2 parts of diffusion oil. According to the invention, the glass-coated silver powder is added into the components, the gloss of the silver powder is close to that of diamond and is not easy to oxidize, and meanwhile, the glass is used as abase material, so that distortion and shearing of the glass in the subsequent process can be avoided, and the complete mirror surface effect of the surface of the 3D printing material in the preparation process is ensured, meanwhile, the preparation process of the glass silver-coated powder is optimized, and the gloss and the mechanical property of the material are remarkably improved, so that theprepared 3D printing material suitable for FDM desktop level has diamond light sensation, is not easy to oxidize and blacken, and is excellent in mechanical property, smooth in printing process, freeof warping, free of fracture and free of wiredrawing.