The nylon powder coating for seat belt buckles is made of high-performance nylon through a special physical process. The powder is a regular spherical shape, suitable for fluidized bed coating technology; The friction coefficient between the coating formed by processing this nylon powder and the metal is small, and the wear resistance is excellent. The adhesion with the metal is excellent, and the special primer 7P-0200 can make the adhesion between the nylon coating and the metal more excellent;