The invention discloses a screw type fertilizing machine. The screw type fertilizing machine comprises a traveling supporting mechanism and a fertilizing mechanism arranged on the traveling supporting mechanism, wherein the fertilizing mechanism comprises a hopper, a fertilizer discharging component and a detecting and controlling system; the hopper is arranged on an armrest frame, the fertilizer discharging component is arranged in a fertilizer discharging port of the hopper, and the detecting and controlling system is used for adjusting the fertilizer discharging speed of the fertilizer discharging component in real time by detecting the traveling speed of a traveling component; the fertilizer discharging component comprises a screw auger and a fertilizer discharging cavity arranged at the lower part of the screw auger. The screw type fertilizing machine and the control method thereof disclosed by the invention have the advantages that the structure is novel, and the implementation is easy; the fertilizing amount is continuously adjusted according to the own traveling speed, so that accurate control is realized; the operation is simple and convenient, so that the fertilizing efficiency is greatly improved, and the labor intensity of workers is reduced; simultaneously, the discharged fertilizer is dispersed easily, so that the absorption by soil is easy.