The invention relates to a feedback type oil-well pump. The lower part of an upper plunger piston is connected with the upper part of an oil outlet valve, and the oil outlet valve is connected with the upper plunger piston; the upper plunger piston is positioned in an upper pump barrel, and a lower plunger piston is positioned in a lower pump barrel; the lower part of the upper pump barrel is connected with the upper part of a connecting pipe, the lower part of the connecting pipe is connected with the upper part of a flow passage joint, and the lower part of the flow passage joint is connected with a large thread of a shunt joint; the lower part of the lower pump barrel is connected with the upper part of the shunt joint, and the lower part of the shunt joint is connected with an oil inlet valve; the shunt joint is provided with a lateral flow passage which is communicated with the oil inlet valve; and the shunt joint is provided with a vertical flow passage which is communicated with the lower pump barrel. The connecting pipe bears axial force, and the lower pump barrel does not bear the axial force, therefore, the feedback type oil-well pump can be used for producing with a long-tail pipe and a packer. The oil inlet valve is arranged on the lower part and not limited by the pump diameter. In the prior sleeve well, the diameter of a valve ball can be increased to a large enough diameter so as to ensure that the valve ball has flexible working, instant close and high reliability in a thick oil well.