Anti-disassembly safety screw

The utility model discloses an anti-disassembly safety screw which comprises an inner cylinder, a fixing mechanism is arranged on the inner wall of the inner cylinder, and the fixing mechanism comprises a sliding rod, a sliding plate, a spring, a clamping block and a vertical rod. The outer wall of the sliding rod is slidably connected with the inner wall of the inner cylinder in a clamped mode, one end of the sliding rod is fixedly connected with one side of the sliding plate, and the outer wall of the sliding rod is attached to the bottom of the clamping block. According to the anti-disassembly safety screw, the screw is driven to rotate, the rotating screw moves towards the inner side of a wall, the moving screw drives a sliding rod on the inner side of an inner barrel to move, the moving sliding rod drives a sliding plate to move, the moving sliding plate drives a vertical rod to move, the moving vertical rod is connected with the inner side of the wall in a clamped mode, and when the sliding rod moves in