The invention discloses a clamping device which comprises a fixing body, a clamping unit, a power part and a pushing part, the clamping unit comprises a plurality of clamping parts distributed in parallel, each clamping part comprises two clamping jaws, the two clamping jaws are rotationally connected to the fixing body, and the two clamping jaws are oppositely arranged; the power part is arranged on the fixing body, and pushes the two clamping jaws of each clamping part through the pushing part when being started, so that the ends, used for clamping objects, of the two clamping jaws are separated from each other; and the two clamping jaws of each clamping part are matched with the fixing body to be provided with reset parts respectively, or the two clamping jaws of each clamping part are matched with reset parts, the reset parts drive the two clamping jaws to reset, and the ends, used for clamping objects, of the two clamping jaws are made to be close to each other. The synchronous opening and closing of the two clamping jaws of the multiple clamping parts can be controlled by adopting a small number of power parts and a simple transmission mode, so that the cost is greatly reduced, the structure of the whole device is simpler, the size is smaller, and the occupied space is reduced.