Fertilizing device for crop planting liquefied waste paper coated controlled-release fertilizer

The utility model discloses a fertilizing device for crop planting liquefied waste paper coated controlled-release fertilizer. The device comprises a tractor, a hopper and a fertilization box, the fertilization box is fixedly mounted at the rear end of the tractor; the hopper is fixedly mounted at the upper end of the fertilization box; a discharge hole of the hopper extends into the fertilizationbox through a hose; a servo motor is fixedly arranged on the inner top wall of the fertilization box, a fixed shaft is fixedly arranged at the shaft end of the servo motor, a sliding column is connected to the lower end of the fixed shaft, the lower end of the sliding column is slidably sleeved with a sliding cylinder, a poking piece is fixedly arranged on the outer surface of the sliding cylinder, and side plates are rotatably arranged on the two side faces of the fertilization box through a rotating shaft. The opening angle of the fertilization box can be controlled by designing the screw rod and the internal threa