(1) Powder coatings do not contain organic solvents, which can avoid environmental pollution, fire hazards, waste of organic solvents and harm to human health caused by organic solvents; powder coatings do not contain water, and can also avoid the water quality caused by water-based coatings. The problem of pollution. (2) The biggest feature of powder coating is that the sprayed coating can be recycled and reused, and the effective utilization rate of the coating is high. If the recovery rate of the recycling equipment is high, the utilization rate of the powder coating can reach 99%. (3) The coating production efficiency of powder coatings is high. One coating can reach the thickness of a few to a dozen coatings of solvent-based or water-based coatings. (4) The coating of powder coatings is not affected by temperature and season, does not require very skilled coating technology, it is easy to master coating technology, and it is easy to realize automatic assembly line coating. (5) The molecular weight of powder coating resin is larger than that of solvent-based and water-based coatings. Therefore, the physical and mechanical properties and chemical resistance of the coating film are better than those of solvent-based and water-based coatings.