The utility model discloses an intertillage machinery aims at providing the cultivator that can carry out the tilling depth according to the soil condition of difference and adjust, can protect the seedling at the farming in -process, increases cultivating work's efficiency, has improved the commonality of cultivator, and then improves potato intertillage fertilizer application operation's quality. The utility model discloses a potato cultivator comprises with installing fertile case in this frame, fertilizer apparatus, fertilization shovel, middle transmission sprocket, intertilling weeding feeler mechanism, disc crop shield etc. The frame. This feeler mechanism is connected with the frame front -axle beam, and the disc crop shield is connected with frame back beam, and fertile case is installed at the frame rear portion, constitutes fertilization system with the fertilization shovel of lower part installation, and the complete machine provides power by tractor traction. The utility model discloses an intertillage fertilizer application operation can be accomplished in the subjob. The utility model is suitable for a potato intertillage fertilizer application operation.