Abstract: An automatic cosmetic bottle capping having a first conveyor belt, a second conveyor belt, and a third conveyor belt. A sliding convex is provided at a surface of the first conveyor belt, a capper is movably sleeved on the first conveyor belt, a suction tip is provided in the capper, rolling balls are provided inside the capper, a through-hole is provided in an external surface of the capper, a capping claw is provided on a lower end of the capper, a positioning plate is provided on an upper end of the capper, springs are provided at a lower end of the positioning plate, a hole plug is movably connected outside the through-hole, and a cap is provided on a front end of the second conveyor belt.