Electric plunger piston pump

The utility model relates to a hydraulic pump, in particular to an electric plunger piston which uses an electric motor for controlling the rotation of an eccentric wheel to drive a plunger piston pump. A pump body is provided with an oil sucking hole and an oil outlet, a pump chamber is arranged in the pump body, the rotary shaft end of a speed reducing electric motor extends into the pump chamber, a plunger piston cylinder is arranged in the pump body and provided with an inlet communicated with the oil sucking hole and an outlet communicated with the oil outlet, a plunger piston chamber is between the inlet and the outlet, a plunger piston conducting or blocking the pipeline between the oil sucking hole and the oil outlet is arranged in the plunger piston chamber, an oil outlet one-way valve is arranged between the outlet and the oil outlet of the plunger piston chamber, and one end of the plunger piston extends into the pump chamber to be connected with an eccentric wheel fixed on the rotary shaft of the