Multi-cylinder ultrahigh pressure automatic reciprocating supercharger with inner circulation cylinder group

The invention relates to a hydraulic supercharger, in particular to a multi-cylinder ultrahigh pressure automatic reciprocating supercharger with an inner circulation cylinder group. The multi-cylinder ultrahigh pressure automatic reciprocating supercharger comprises N bidirectional supercharging cylinders and matched reversing valves, supercharging cavities of the supercharging cylinders are provided with control ports, the supercharging cylinders are sequentially arranged, the control port of each supercharging cylinder is connected with a pilot port of the reversing valve matched with a next supercharging cylinder, the N supercharging cylinder is not provided with a control port, a first supercharging cylinder to an X supercharging cylinder among the N supercharging cylinders are arranged in a circulating manner, the (X+1) cylinder to the N cylinder are sequentially arranged, namely, the supercharging cavity of the X cylinder is further provided with a second control port based on sequential arrangement of