The splash or forced lubrication will be used for the power end with the characteristics of small size, compact structure, stable driving, lower friction coefficient, low temperature and suitable for long time operation. The pump can be applied to coal excavation with high pressure water jetting, hydraulic liquid supply in the well, high pressure water cleaning, metallurgy descaling, powder metallurgy, shipping rust elimination, basic engineering, liquid transportation, engineering and pressure test for various rubber hose, metal tube and oil well as well. The medium to be pumped can be clear water and some other chemical liquids as well.