The invention relates to a long-plunger-piston gas-locking-prevention respective pumping mixing oil well pump, which comprises an oil rod, an oil well pump joint, a dirt storage tube, a first pump tube joint, an upper pump tube, a plunger piston, a second pump tube joint, a piston, a constant pressure slide sleeve outer tube, a lower pump tube, a packer and a fixed valve, wherein the lower end of the oil rod is connected with the plunger piston, the plunger piston is arranged in the upper pump tube and the lower pump tube in a penetrating way, the upper part of the upper pump tube is sequentially provided with the oil well pump joint and the dirt storage tube, the second pump tube joint and the constant pressure slide sleeve outer tube are arranged between the upper pump tube and the lower pump tube, the piston is arranged in the constant pressure slide sleeve outer tube, the lower part of the piston is provided with a copper pin, and the tail end of the lower pump tube is sequentially connected with the packer and the fixed valve. The problems of poor oil extraction effect and interlayer mutual invasion caused by nonuniform energy of each storage layer and the like can be effectively solved, the gas locking can be effectively prevented, and the pump efficiency is improved.