Pump core structure of hydraulic pump of electric hydraulic horizontal jack

The utility model discloses a pump core structure of a hydraulic pump of an electric hydraulic horizontal jack. The pump core structure is characterized by comprising a valve seat and a piston cavity arranged on the valve seat, the pump core structure is arranged in the piston cavity, the small pump core oil outlet cavity and the middle pump core oil outlet cavity are communicated with the piston cavity, and the one-way valves are arranged in the small pump core oil outlet cavity and the middle pump core oil outlet cavity. The pump cores are arranged to be in a multi-pump-core mode, in the process that the eccentric wheel and the spring are matched to drive the pump cores to do reciprocating motion continuously, the multi-pump-core pressing work is completed when the pump cores are pushed every time, multi-stage pressing is completed when the pump cores do one-time motion, and the effect that the jacking speed is high during no-load and light-load is achieved; when the heavy load or the load exceeds the press