When the wheat no tillage cover fertilization seeder is operating, the power of the tractor is directly transmitted to the middle gearbox of the seeder through the transmission shaft, and drives the left and right blade shafts to rotate and cut. When the blade contacts the ground, the front rotary blade cuts off some of the straw or stubble and puts it into the soil for strip loosening. The following sowing and fertilization trenching device pushes the straw and stubble to both sides of the sowing and fertilization positions while opening the ditch. The depth limiting roller at the rear rotates by friction with the ground due to its own mass, and is driven by a chain transmission mechanism to implement seed and fertilizer discharge. The seeds and fertilizers that are discharged are respectively fed into the trencher through seed and fertilizer pipes, and then fall into the already opened trench in sequence. The compaction wheel then loosens and compacts the soil in the trench, completing the no till cover fertilization and sowing operation.