The invention discloses a fertilizer applying, soil grabbing and earthing-up method. A fertilizer applying, soil grabbing and earthing-up machine is adopted to achieve fertilizer applying, soil grabbing and earthing-up at the same time, and comprises a frame (5), a driving and travelling system, a transmission system, a fertilizing system, a soil loosening and earthing-up system and an operating system. The driving and travelling system, the transmission system, the fertilizing system, the soil loosening and earthing-up system and the operating system are arranged on the frame. The fertilizing system is capable of controlling fertilizer discharging speed and fertilizer scattering width, and the soil loosening and earthing-up system is capable of adjusting the soil loosening depth. The fertilizer applying, soil grabbing and earthing-up method is easy to implement, integrates a fertilizer applying function with a soil loosening and earthing-up function, and is high in working efficiency.