In view of its excellent performance and cost performance, single screw pump has gradually been widely used in China in recent years. Its main features are strong adaptability to the medium, stable flow, small pressure pulsation, and high self-priming ability, which cannot be replaced by other pumps. Single screw pump is widely used in petrochemical, environmental protection, exploration and mining, medicine and food, shipbuilding industry, energy industry, papermaking, construction, mining, machinery and other industries.