high-pressure pump is an improved product of the 3D2-S high-pressure pump. Its characteristics are: First, the capacity of the lubricating oil in the crankcase increases, the lubricity is improved, and the lubricating oil temperature rises low. Second, the shaft diameter of the crankshaft is increased, the strength of the crankshaft is improved, and the transmission power is increasedLarge, so that the output pressure of the pump is larger, and the use range is more extensive. Third, the power end crankshaft and connecting rod adopt forced lubrication, small friction coefficient, good lubricity, stable transmission, lower temperature rise of the power end, more suitable for long-term continuous operation. It is suitable for high-pressure water jet auxiliary flow cleaning, metallurgical phosphorus removal, powder metallurgy, ship cleaning and rust removal, basic engineering, liquid transportation, engineering excavation and various hoses, metal pipes, oilfield drilling imported equipment pressure test pump, not only pumping clean water, emulsion, but also pumping other liquids with chemical properties similar to clean water.