The invention relates to an active yarn conveyor which comprises a fixed seat, a rotating shaft, a yarn guide rod, a plurality of drive belt wheels, a yarn conveying wheel, a yarn guide frame, an upper section light and a yarn cut-off switch, wherein the rotating shaft and the yarn guide rod are arranged on the fixed seat; the plurality of drive belt wheels are arranged on the rotating shaft on the upper part of the fixed seat; the yarn conveying wheel is arranged on the rotating shaft on the lower part of the fixed seat; the drive belt wheels and the yarn conveying wheel rotate in a coaxial mode, and clutches are arranged between the drive belt wheels; the yarn conveying wheel is provided with a plurality of yarn guide grooves the bottom groove diameters of which are different, and the surfaces of the yarn guide grooves are set to be abrasion-proof hard frosted surfaces; the yarn guide rod is arranged below the fixed seat and parallel with the rotating shaft and has a proper distancewith the front end of the yarn conveying wheel, and a sleeve provided with a plurality of grooves and a smooth surface is sleeved on the body of the yarn guide rod; and by the matching of the yarn conveying wheel and the yarn guide rod, yarns are sequentially wound on the yarn guide grooves of the yarn conveying wheel and the grooves of the yarn guide rod by layers from top to bottom. The active yarn conveyor can be used for conveying stable and synchronous yarns with a consistent length onto a knitting machine for knitting to obtain smooth and clear knitted cloth patterns.