The wear-resistant treatment method of the Roots blower with three blades is applied in industries such as steel, electricity, cement, and paper. Due to the large amount of gas medium and acid gas hard dust particles delivered, the highly corrosive overcurrent components of this equipment, especially the impeller and blades of the heart component, can reach up to 160 meters per second at the end of the production line speed, with a more severe wear rate than other parts. According to statistics, using ordinary carbon steel or general wear-resistant 16 Mn steel impellers generally has a service life of only one and a half years, only a few days. Although all types of surface wear measures used, such as welding, spraying, spray welding coating polymer wear-resistant materials, are difficult to significantly improve the service life. The more commonly used method, used in welding, has a good effect and can usually be used for more than a year without requiring major repairs.