The diesel engine fire pump has compact structure, small size and beautiful appearance. Its vertical structure determines that the installation area is small, and its center of gravity coincides with the center of the pump foot, thus enhancing the running stability and service life of the pump. The horizontal direction simplifies the connection of the pipeline, the pump rotor has a small winding, stable operation, low vibration, low noise and long service life. Diesel engine fire pump is mainly used for pressurized water supply in fire protection system pipelines, and can also be used in industrial and urban water supply and drainage, high-rise building pressurized water supply, long-distance water supply, heating, bathroom, boiler cold and warm water circulation pressurized air conditioning refrigeration system water supply and equipment matching, etc. occasion.