Repeatedly-usable lifting gear

The utility model relates to a reusable lifting device which comprises a platform body, a guide ring, a platform connector, a platform connecting pin, a movable pile reinforcing frame, a square beam, a support of ring beam plug-pull cylinder, a ring beam plug-pull cylinder, a movable ring beam, a lifting cylinder, a top plug-pull cylinder, a support of top plug-pull cylinder, a top gear block connector, a gear block, a rack, a pile leg, a connecting pin of pile reinforcing frame, a lower gear block connector, a lower plug-pull cylinder, a support of lower plug-pull cylinder, a ring beam guide plate, a pile reinforcing plate. The platform body and the pile leg realize transmission and relative movement by the platform connector, the platform connecting pin, the movable pile reinforcing frame, the lifting cylinder, the ring beam, the square beam, the gear block and the rack and realize lift of the platform. The gear block and the rack are multiply contacted, the arrangement set is modularized and produced and capable of reusing. The lifting device has stability and low cost and is applicable of greatly saving seashore construction cost and time of fixed platform.