The invention discloses a seed discharging method. According to the method, a seeding plate 8 of a seeding machine swings around a rotating shaft 1 back and forth in a clearance mode, and a seed tank 6 moves along a guide rod 3 back and forth in a clearance mode; the seeding plate 8 anticlockwise rotates to the leftmost position from the horizontal lowest position, and meanwhile the seed tank 6 moves to the highest position from the bottommost position; the seeding plate 8 stops to be static after reaching the leftmost position, and the seed tank 6 moved downwards from the highest position at once; a magnetic head 9 sucks magnetic powder-coated seeds 19, the seed tank 6 stops to be static at the lowest position, and the seeding plate 8 rightwards swings to the horizontal position from the leftmost position. Accordingly, by means of the method, not only are the precise seeding requirements of small-particle seeds of vegetables and flowers, but also the precise seeding requirements of crops such as oilseed rape and rice met.