Zero point positioning device and system

The utility model discloses a zero-point positioning device and a zero-point positioning system, and belongs to the field of product processing. In order to solve the problems that an existing zero-point positioning structure is complex and high in cost, the zero-point positioning device comprises a shell, a positioning hole is formed in the shell, a rotating shaft, a wedge-shaped block and clamping jaws are arranged in the shell, the rotating shaft is connected with a driving mechanism, the clamping jaws are arranged on the two opposite sides of the positioning hole, and the wedge-shaped block is connected with the clamping jaws. The rotating shaft is driven by the driving mechanism to rotate, the rotating shaft rotates to drive the wedge-shaped block to move up and down, the wedge-shaped block moves up and down to drive the clamping jaw to stretch out or retract in the positioning hole, and a component in the positioning hole is fixed or loosened. According to the device, the rotating shaft, the wedge-shape