The invention provides a self-propelled ridging precise-hole fertilizing method and device. The device includes a rack, an engine, a gearbox, a ridging rotary blade, walking wheels, a chain drive, a belt drive, a storage battery, a fertilizer discharging motor, a revolution speed sensor, a chuck, a fertilizer discharging device, a material discharging device and a material box. When the device operates, ridging and fertilizing can be achieved simultaneously, and the working efficiency is greatly improved; through a fertilizing and marking control system, the advance speed of the device can be monitored in real time, precise hole fertilizing is conducted according to the fertilizing amount and fertilizing spacing, and fertilizing points are precisely marked on ridge surfaces. Therefore, crops with plant spacing requirements can be precisely fertilized, and deep application of base fertilizer meets agronomic requirements. The intensity of manual work is obviously reduced, the precision of fertilization is improved, and the device is simple and compact in structure, and low in cost.