The invention discloses an inclined disk type small seed small-amount seed sowing device. The inclined disk type small seed small-amount seed sowing device comprises a seeding box, a seed filling room case, a seed entering quantity adjusting plate, a seed filling disk, a seed sowing device shell, a seed sowing disk and a seed sowing device shaft. The seed sowing device is installed on a seed sowing machine in a mode of inclining 30 to 60 degrees. The structures of the seed filling disk and the seed sowing disk are utilized, the whole seed sowing process is divided into four steps of seed filling, seed cleaning, seed inputting and seed sowing, the seeds are guaranteed to be sowed in the lowest position, the seed sowing height is lowered, the time on seed sowing is shortened, and seeds per bunch and intervals can be guaranteed effectively; according to the inclined disk type small grain small-amount seed sowing device, seed filling is conducted softly and automatically depending on the gravity, seed cleaning is conducted softly and automatically by utilizing the gravity, a seed cleaning brush is arranged, few seeds clamped in seed filling holes can be brushed down, and seed clamping and seed damaging are avoided; the seed filling disk and the seed sowing disk are exquisite in structure and are both provided with two bosses, positioning with rolling bearings is reliable, fit clearance with the seed sowing device shell can be guaranteed, friction with the seed sowing device shell is avoided, and the service life of the seed sowing device is prolonged greatly.