Device facilitating installation of aluminum alloy air cylinder end cover

The utility model discloses a device for conveniently installing an end cover of an aluminum alloy air cylinder, which comprises a circular placing plate, extension plates are arranged on two sides of the surface of the circular placing plate, a screw rod is connected in the extension plates in a threaded and penetrating manner, one end of the screw rod is connected with a concave plate, a semicircular plate is arranged in the middle of the back of the concave plate, and the semicircular plate is connected with a screw rod. An L-shaped supporting rod is installed at the top of the semicircular plate, and a circular sleeve is installed at one end of the L-shaped supporting rod. Through the arrangement of the L-shaped supporting rod, the concave plate, the lead screw, the connecting rope, the drag hook and the take-up roller a, when an installation person installs an air cylinder cover, the installation person can firstly hang the air cylinder cover at the bottom end of the drag rope through the drag hook, then