Automatic Rotary Capping Machine can implement positioning and placing threaded caps precisely. This bottle capping machine can prevent bottles and caps from damage during the capping process, so as to ensure high work efficiency. It also has automatic nitrogen injection and cap removal functions, and features stable operation, low noise, long service life and wide range of applications. Besides, capping speed is adjustable, this makes the rotary capper suitable for large and medium-sized packaging workshops.