Simple and practical steel formwork fastening device

The utility model discloses a simple and practical steel formwork fastening device which comprises a movable hook, a fixing rod is installed at the front end of the movable hook, a connecting block is welded to the surface of the fixing rod, a threaded rod is fixedly arranged at the front end of the fixing rod, a sliding block is installed on the outer side of the threaded rod in a sliding mode, and the sliding block is welded to the surface of the fixing rod. The side face of the sliding block is fixedly connected with a steel pipe buckle piece, a nut is installed on the threaded rod in a threaded mode, and the movable hook comprises a hook rod. A lap joint plate is fixedly arranged at the front end of the hook rod, a movable groove is formed in the lap joint plate, a movable block is slidably installed in the movable groove, a connecting block is fixedly arranged on the rear side of the movable block, and the connecting block is connected with the fixing rod in a welded mode. The hook rod and the connecting