Vertical single-suction multi-stage segmented fire pump is used for transferring clear water without solid particles and liquids with physical and chemical properties similar to water. It is mainly used for water supply for high-rise firefighting, and it can also be used for water supply and drainage in factories and mines. The flow range of the transferred liquid is 0.83~100L/S, the pressure range is 0.2-2.3Mpa, and the diameter range is φ25~φ200mm.