Double-sliver asynchronous feeding and three-level carding rotor spinning method and device

A device of a multi-level carding rotor spinning method comprises a spinning system and a computer control system. The spinning system comprises a feeding carding mechanism, a condensed twisting mechanism and a winding shaping mechanism. The spinning system is characterized in that the feeding carding mechanism comprises two combined type feed rollers of rotation degrees of freedom and a multi-level carding roller, the speed ratio of the two combined type feed rollers of rotation degrees of freedom can be adjustable, and random adjustment and control of linear density and blending ratio of yarn which is spun through a rotor are achieved.