The invention provides a kinetic-energy carded cotton impurity removing device. The kinetic-energy carded cotton impurity removing device comprises guide roller pairs which are used for conveying a cotton sliver and arranged at equal intervals, shaking bars repeatedly making shearing movements towards a conveying track of the cotton sliver are arranged among the guide roller pairs, and a bar-shaped collecting groove opposite to each shaking bar is arranged on the other side of the conveying track of the cotton sliver. The kinetic-energy carded cotton impurity removing device has the advantages that under the action of a driver, the shaking bars make repeated shearing movements towards the conveying track of the cotton sliver, so that impurities in the cotton sliver can be impacted and thrown out, impurity removing is realized, and the problem that a noil rate is increased due to excessive cotton carding is reduced.