The invention belongs to the technical field of potato seeders, and particularly discloses a layered-fertilizing potato seeder which comprises a vehicle body, a layered fertilizing device, a seed discharging device, a ridging device, a mulching device, an earthing and film pressing device and a hydraulic control device. A tripod is fixedly mounted at the top of the left side end of the vehicle body, a ground wheel is fixedly mounted in the middle of the left side of the vehicle body, front and rear side ends of the ground wheel are connected with a ground wheel shaft in an inserted manner, thelayered fertilizing device is fixedly mounted on the ground wheel shaft, a fertilizer box is fixedly mounted at the top of the layered fertilizing device, and the hydraulic control device is fixedlymounted on the left side wall of the fertilizer box. The layered-fertilizing potato seeder can complete ditching, fertilizing, seeding, ridging, mulching and film pressing at the same time; a hydraulic oil way is utilized to realize layered precise application and to accurately control ditching depth of a hydraulic fertilizer ditcher, so that comprehensive effect of reasonability of mechanism design is ensured.