The utility model discloses a constant feedback force oil pumping device. The constant feedback force oil pumping device comprises an offset fluid feeding valve, an upper pump cylinder, an upper plunger, a lower pump cylinder, and a lower plunger; the upper pump cylinder and the lower pump cylinder are respectively installed at the upper end and the lower end of the offset fluid feeding valve; the inner parts of the upper pump cylinder and the lower pump cylinder are respectively provided with the upper plunger and the lower plunger; the lower end of the upper plunger is connected with an upper discharging valve, and the lower end of the lower plunger is orderly connected with a dual-way joint, a connecting pipe and a choke end; the inner part of the connecting pipe is provided with the lower discharging valve, and the upper end of the lower discharging valve is connected to the lower end of the dual-way joint. The lower end of the lower plunger is connected with the dual-way joint through an extension pipe; a relatively closed space is formed by the lower plunger, the extension pipe, the dual-way joint, the lower discharging valve, the connecting pipe and the choke end; the lower end of the upper discharging valve is connected with a hanging joint, and the upper end of the lower plunger is connected to the lower end of the hanging joint through the hanging rod. According to the constant feedback force oil pumping device, the feedback force provided by the constant feedback force oil pumping device is not related to a dynamic liquid face of an oil well but related to the depth of setting; the constant feedback force oil pumping device overcomes the problems existed in the oil pump at present.