The diesel engine mobile pump truck is composed of a diesel engine and a fire pump. The pump group is in the form of a horizontal, double-suction, single-stage centrifugal fire pump. It has the characteristics of high efficiency, wide performance range, safe and stable operation, low noise, long life, convenient installation and maintenance, etc. For conveying clean water or other liquids with physical and chemical properties similar to water, it can also be used to convey hot water, oil, corrosive or abrasive-containing media by changing the material of the pump flow parts, the sealing form and increasing the cooling system.