The invention discloses a hydraulic pump structure for a double-speed separating type hydraulic jack, belongs to the technical field of hydraulic facilities. The hydraulic pump structure comprises a base, a pump body on the base, a pump core in the pump body, a press handle connected with the pump core, an oil storage pipe matched with the base, a high-pressure oil pipe matched with the base and a hydraulic oil way system arranged on the base, wherein the oil storage pipe and the high-pressure oil pipe are communicated with the hydraulic oil way system; the base is provided with a base ladder cavity for the configuration of the pump body, the pump body is a ladder-type pump body and matched with the base ladder cavity, and the pump body is communicated with the hydraulic oil way system; and the pump core is a ladder-type pump core and fit with the pump body. The hydraulic pump structure has the advantages that the hydraulic pump structure is in favor of processing a first pump stem cavity and a second pump stem cavity and can guarantee the processing quality so as to effectively improve the integral matching effect of the pump core and the pump body; and furthermore, the material loss for processing the base and the pump body is saved and the integral volume is reduced.