The utility model discloses a movable operation frame for tensioning a precast beam. The hoisting device comprises a frame body, a cross beam, a hoisting device body, a first sliding mechanism and a second sliding mechanism, the hoisting device body is connected with the cross beam through the first sliding mechanism, the two ends of the cross beam are connected with the frame body through the second sliding mechanism, a first locking device is arranged on the first sliding mechanism, and a second locking device is arranged on the second sliding mechanism. According to the utility model, through the second sliding mechanism, the first sliding mechanism and the hoisting device, the hoisting device is formed; according to the lifting device, the jack can be quickly adjusted to a proper position, and meanwhile, the position of the lifting device can be fixed through the first locking device and the second locking device, so that the lifting device is prevented from shaking due to externalforce in the operation process, the working efficiency is improved, the manual working intensity is reduced, and the lifting device can be widely applied to bridge construction.