The invention relates to the technical field of agricultural machinery and concretely relates to a cutter roller of a biennial root sugarcane supervisor. The cutter roller of the biennial root sugarcane supervisor comprises a cutter roller shaft. A spiral cutter is disposed in the middle of the cutter roller shaft; a plurality of flat cutter sets are arranged on two ends of the cutter roller shaft; a distance between a cutting edge of the middle of the spiral cutter and an axis of the cutter roller is the largest; distances between cutting edges of the spiral cutter and the axis of the cutterroller shaft are gradually decreased from the middle of the spiral cutter to the two ends; and the flat cutter sets are tangent to a roller surface of the cutter roller shaft. The cutter roller of thebiennial root sugarcane supervisor is simply structured and convenient to use; and by the use of the cutter roller, problems of difficulties of sugarcane leaf returning to the field, trench and ridgeblock due to weeds and following-up film coating work difficulty due to the remained of newly-grown sugarcane seedlings during the management of the biennial root sugarcane can be solved.