The invention discloses a precision sugarcane seed-metering device, and belongs to the technical field of agricultural machinery. By virtue of the combination of motions such as lift of scraper elevating chains, horizontal push of inclined pushing chains, seed placing and cleaning of a hairbrush presser, seed delivery of a distributor and the like, single-seed precision sowing of sugarcane seed tubers is realized. The invention aims to provide the precision sugarcane seed-metering device to solve the problems that the sugarcane planting industry in China is still dominated by manual work whenusing sugarcane seed tubers for seeding and waste of manpower resources is serious. The precision sugarcane seed-metering device has the characteristics of being continuous, high-speed, precise in sowing and low in miss-seeding and re-seeding rate, and the purpose of mechanical precision sugarcane sowing can be achieved. Moreover, the precision sugarcane seed-metering device has the effects of obviously improving efficiency, saving manual labor, alleviating labor intensity and reducing operating costs.