The invention discloses a discharging device for yarn. The discharging device comprises a drive assembly, a discharging roller and a yarn guiding device. The discharging roller comprises a plurality of transverse rods arranged in parallel, and a first baffle and a second baffle are arranged at the two ends of each transverse rod correspondingly. The sides, close to each other, of each first baffleand the second section on the corresponding second baffle are provided with scale lines, wherein the extending direction of the scale lines is the same as the extending direction of the axis of the first baffle or the second baffle where the scale lines are located. Bendable stop sheets are arranged at the positions where the scale lines are set. The drive assembly comprises drive motors, whereinthe number of the drive motors is the same as the number of the transverse rods, the drive motors are arranged at one ends of the transverse rods corresponding to the drive motors, and the transverserods are driven to rotate. The wire guiding assembly comprises metal rings sequentially arranged in the vertical direction, a connecting arm is arranged between every two adjacent stainless steel rings, and the top end and the bottom of the wire guiding assembly are adjacent to the top end and the bottom end of the discharging roller through connecting rods correspondingly. The discharging deviceis simple in structure, high in discharging efficiency, and capable of being well matched with a spinning machine and solving the problems of yarn knotting and the like.