Four-cylinder double-acting reciprocating gas-liquid multiphase pump

The utility model discloses a four-cylinder double-acting reciprocating gas-liquid multiphase pump, which comprises a power end and a hydraulic end, wherein an opening of a work cavity of a hydraulic cylinder is arranged on the top portion, and an interlink channel of a combined valve is communicated with the opening arranged on the top portion of the work cavity. The four-cylinder double-acting reciprocating gas-liquid multiphase pump is uniform in flow, small in vibration influence to equipment, large in flow and high in work efficiency.