Method for enhancing strength of 3D printed products

The invention belongs to the field of a 3D printing technology and specifically relates to a method for enhancing strength of 3D printed products. The invention aims to solve the technical problem that strength of 3D printed products, especially 3D printed products printed by a fused deposition modeling method in the part-forming Z direction is poor. A raw material of the printed part product is a solute, and a cooperative solvent can effectively dissolve a shallow surface layer of the product. Thus, the shallow surface layer of the product and the solute are fused as a whole. Juncture of 3D printed stack layers is effectively filled, shallow surface layer strength of the juncture is increased, and strength of the 3D printed product is further enhanced. By the method, strength of parts is enhanced, and dimension of parts is basically not changed. The method is very beneficial to expand application range of special plastic parts 3D printed by an FDM technology. The technical problem that has existed in the field all the time is solved. The method has a good application prospect.