The invention discloses a hydraulic oil pumping device. The hydraulic oil pumping device solves the technical problem that in the stroke increasing process, an existing hydraulic oil pumping machine is not good in stability, so that large stroke is more easily achieved. The hydraulic oil pumping device comprises a sleeve, an oil cylinder, a piston assembly, an oil pipe process pipe, a well opening four-way joint, an oil pumping rod and an oil pipe. The oil cylinder is fixed into the oil pipe process pipe. The upper portion of the oil pipe process pipe is annularly sleeved with the well opening four-way joint. The lower portion of the oil pipe process pipe is annularly sleeved with the sleeve. The well opening four-way joint is fixed to the oil pipe process pipe. The sleeve is fixed to the well opening four-way joint. The piston assembly is axially inserted in the oil cylinder. The lower portion of the piston assembly is connected with the oil pumping rod. The lower portion of the oil pipe process pipe is connected with the oil pipe. Sealing is formed between the middle of the piston assembly and the inner wall of the oil cylinder. Sealing is formed at the positions, corresponding to inner hole annular grooves of the upper end and the lower end of the oil cylinder, of the piston assembly. By means of the hydraulic oil pumping device, the large stroke can be more easily achieved, and the stability is improved while the large stroke is achieved.