Reciprocating pump and oil extraction device

The embodiment of the utility model relates to the technical field of oil extraction, and particularly discloses a reciprocating pump and an oil extraction device, and the reciprocating pump comprises a shell, a piston mechanism, a thread lifting mechanism and a driving mechanism. The piston mechanism is arranged in the shell. The threaded lifting mechanism is arranged in the shell and comprises a reciprocating screw and a sleeve, the reciprocating screw is in threaded fit with the sleeve, and the sleeve is connected with the piston mechanism. The driving mechanism is connected with the reciprocating screw and can drive the reciprocating screw to rotate and drive the sleeve and the piston mechanism to move relative to the shell. By means of the structure, the driving mechanism drives the reciprocating screw to rotate, the reciprocating screw drives the sleeve to reciprocate, the sleeve drives the piston mechanism to move, a crank rocker mechanism is replaced with the thread lifting mechanism, the piston mecha