Laminating device of lead screw and air cylinder of large vacuum laminating machine

The utility model discloses a lead screw and air cylinder laminating device of a large vacuum laminating machine, and relates to the technical field of vacuum laminating. The lead screw and air cylinder laminating device of the large vacuum laminating machine comprises a main body, the inner wall of the main body is hollow, the inner wall of the main body is fixedly connected with the bottom of a fixing seat, a cleaning device is arranged on the fixing seat and comprises two sets of fixing plates, and the fixing plates are fixedly connected with one side of the fixing seat. And one sides of the two groups of fixing plates are rotationally connected with two ends of the threaded rod A. By arranging the cleaning device, when a threaded rod A rotates, the threaded rod A drives a moving block A to move, the moving block A drives a cleaning rod to move, a cleaning brush at the bottom of the cleaning rod cleans the surface of the liquid crystal glass substrate, and meanwhile, a moving block B on one side of the cle