This is a kind of single-point oil Lubrication pump with hydraulic pressure driving the plunger as the power. It is the first generation hydraulic oil Lubrication pump designed for small and middle machinery with hydraulic source. Compared with the traditional electric Lubrication system or pure manual Lubrication system, it has features of low noise, simple structure, easy maintaining, energy-saving and automatically long-time lubrication. It also has the function of high-pressure protection. The oil mass can be adjusted in the range of ±30‰.