The invention discloses a method for the high-efficiency untying and cutting of a waste and old cable pile, and the method comprises a feeding step: putting the waste and old cable pile into a feedingpart; an untying step: pulling one or more cables out of the waste and old cable pile, and untying the cable pile; and a cutting step: cutting the cables pulled from the waste and old cable pile. Themethod employs the steps (feeding-untying-cutting) for completing the untying and cutting of the cable pile, is simple in technological process, is wide in application range, and facilitates the industrial application. The method is simple in operation, is safe and efficient, is high in automation degree, and is green and environment friendly.