Thermal spraying technology is an important branch in surface engineering. It heats some linear and powdery materials to melting or semi-melting state by heat source such as flame, arc or plasma, Jet to the substrate to form a coating. The coating is resistant to abrasion, corrosion, high temperature and thermal insulation, and offers the ability to repair parts that are subject to wear, corrosion, or process tolerances. The application of thermal spraying technology mainly includes: long-term preservation, mechanical repair and advanced manufacturing technology, mold making and repairing, manufacturing special functional coating and other four aspects. At present, thermal spraying technology has been widely used in almost all industrial areas and household products (such as non-stick pan, infrared health care heater, etc.).