The utility model relates to the technical field of quantitative fertilization, and discloses a soil quantitative fertilization device which comprises a
material storage tank, the top of the
material storage tank is in threaded connection with a tank cover, a quantitative fertilization mechanism is arranged at the bottom of the
material storage tank, the quantitative fertilization mechanism comprises a material guide seat, and the bottom of the material
storage tank is fixedly connected to the top of the material guide seat. The soil quantitative fertilization device can be operated by one person for fertilization, manpower resources are saved, through arrangement of the
storage tank, the discharging port and the feeding port,
fertilizer can be conveniently discharged between the material pushing plate and the positioning block in the material guiding seat, through arrangement of the first electric telescopic rod, the material pushing plate, the connecting rod and the positioning block can be conveniently driven to move in a reciprocating mode, and the
fertilizer applying efficiency is improved. When the material pushing plate, the connecting rod and the positioning block reciprocate each time, the same amount of
fertilizer can be pushed to the discharging opening and discharged into soil through the material guiding
pipe, the through groove and the discharging
barrel, quantitative fertilization is facilitated, and the fertilizer can be fully and effectively utilized.