The invention provides an anti-hardening soybean sowing machine with functions of seedling belt rotary tillage and soft earth coverage. The machine is used for realizing rotary tillage of fields, soybean sowing and soft earth coverage. The machine comprises a rack and walking wheels arranged on the rack, wherein rotary tillage rollers are arranged on the front side of the rack, two groups of firstcrushing teeth, two groups of second crushing teeth, two soil shoveling plates and two leveling plates are arranged on the outer wall of each rotary tillage roller in the circumference in sequence; asowing mechanism is arranged in the middle of the rack and comprises a casing, a sowing wheel rotationally mounted in the casing, seed grooves formed in the outer wall of the sowing wheel, an upper conveying pipe fixed on the casing, a lower conveying pipe fixedly connected with the lower end of the casing, an extending pipe glidingly arranged on the lower conveying pipe, a support lug fixed on the rack, a guiding wheel rotationally mounted on the support lug, a reel rotationally mounted on the rack, a handle fixed on the axis of the reel and a bracing wire winding around the reel; an earth covering wheel is arranged on the rear side of the rack. With the adoption of the method, soybean seeds can be sown effectively.