The utility model discloses a centering device based on current monitoring, which relates to the technical field of positioning mechanisms, and is characterized in that two support plates are arrangedin parallel, a lead screw and a guide rod are arranged between the two support plates, and two ends of the guide rod are fixedly connected with the two support plates respectively; the lead screw isrotationally connected with the two supporting plates through two bearings respectively, one end of the lead screw penetrates out of the outer sides of the supporting plates and is connected with theoutput end of the motor, the middle of the lead screw serves as a parting line, and threads on the two sides of the parting line are opposite in spiral direction; the two clamping jaws are symmetrically mounted on the guide rod and can slide along the guide rod; threaded holes are formed in the positions, corresponding to the lead screws, of the clamping jaws, and the clamping jaws are matched with the lead screws through the threaded holes. The motor drives the lead screw to rotate, the two clamping jaws are driven to synchronously move along the guide rod, a workpiece is centered from the two sides, the rotation of the motor is controlled by monitoring current, and the centering precision of the workpiece is guaranteed; workpiece centering is achieved through mechanization, the production efficiency is improved, and the labor cost is reduced.