Rotor spinning machine is a kind of high-speed, highly efficient and self air exhaust free-end spinning frame with flow dusting device, which is applicable for spinning of cotton, wool, linen, filament, silk, polyester, viscose, vinylon, polypropylene fiber, cotton yarn and blended fabric. This spinning method is a new spinning method developed since 1950. It belongs to free-end spinning, namely, in spinning, when twisting filament breaks, negative pressure is formed , with high-speed rotation of rotor the filament will be multi- twisted.