The utility model relates to a sliding ejection pump, which is a subsurface tool for outflow to acquire production in oil exploration and development process. The utility model re-conducts the structural design. The pump cartridge assembly adopts common ejection pumps. The pump cartridge is arranged in the pump barrel assembly and is composed of an upper contact, a lock nut, an oil outlet joint, a sealing bush, a sliding sleeve and a lower contact; wherein, the lower end opening of the upper contact is connected with the oil outlet joint; the lock nut crosses through the upper contact and wraps the upper end of the oil outlet joint; the sealing bush is arranged between the oil outlet joint and the upper contact; the sliding sleeve is fixed outside the oil outlet joint with pins and surrounded the fluid outlet hole of the oil outlet joint. The lower joint is connected with the lower end of the oil outlet joint. The joints of each component are sealed with sealing rings. The utility model adopts direct circulation for liquor drainage. The sliding sleeve switch adopts hydraulic pressure for operation, thus the operation is stable and reliable. The sliding sleeve can form a triplex test string with a gun perforator and a tester. Thereby, a plurality of tasks can be fulfilled in a round of pipe column movement, thus the oil test cycle period can be shortened, and the cost can be greatly reduced.