Plastic due to the lightweight, easy to process, corrosion-resistant, resource-rich and other characteristics, has widely replaced the traditional materials, such as metal, wood, leather, and so on, commonly found in our daily lives. However, the molding and processing of plastic products will produce uneven color, monotonous color, spots and other defects, and prone to aging and brittle, scratches, staining, static electricity and other problems. Coatings can avoid the above defects and problems, research and development of plastic coatings has been widely concerned by coatings workers. However, because plastic is a low surface energy material, its surface coating is much more difficult than steel, wood, construction and other surfaces, adhesion has become a major obstacle to the development of plastic coatings. It is necessary to choose different formulations of coatings according to different plastic substrates, so as to produce better adhesion. With the improvement of people's living standards and the strengthening of environmental protection awareness, plastic coatings, like other coatings, is moving towards the direction of functionalization and environmental protection.