The invention discloses a quantitative corn planting and fertilizing device, and relates to the technical field of corn seeding, the quantitative corn planting and fertilizing device comprises a base, universal wheels arranged at the bottom of the base and a
handle arranged on the base, the quantitative corn planting and fertilizing device further comprises a screening
assembly, the screening
assembly comprises a screening box arranged at the top of the base, a sliding plate is arranged on the screening box, and a push plate is connected to the sliding plate; a connecting
rope is connected to the top of the sliding plate, a limiting plate is connected to the top of the screening box, the connecting
rope is slidably connected to the limiting plate, a limiting ball and a discharging
assembly are connected to the connecting
rope, the discharging assembly comprises a rotating shaft rotationally connected to the screening box, an opening and closing plate is connected to the rotating shaft, and an elastic piece is connected between the opening and closing plate and the screening box. Wizened seeds, damaged seeds and impurities can be effectively removed, full and uniform high-quality seeds are reserved, the emergence rate is increased, the phenomena of
seedling missing and
ridge breaking are reduced, the
seedling supplementing cost is reduced, the
plant spacing uniformity is guaranteed, sick seeds and worm eggs can be removed through screening, the occurrence rate of
insect pests in the
seedling stage is reduced, and the
pesticide use amount is reduced.