Beet planting device capable of automatically applying pesticide

The utility model belongs to the technical field of beet planting, in particular to a beet planting device capable of automatically applying pesticide, which comprises a support frame, a pesticide storage tank and a pesticide sprayer, the pesticide storage tank is fixedly connected to the inner wall of the support frame, the inner wall of the pesticide storage tank is rotatably connected with a support rotating shaft, the side wall of the support rotating shaft is fixedly connected with a plurality of support rods, and the support rods are fixedly connected with the pesticide sprayer. The positions of the multiple supporting rods are evenly distributed, one end of each supporting rod is fixedly connected with an arc-shaped plate, and the bottom end of the pesticide storage tank is provided with a plurality of pesticide discharging holes corresponding to the pesticide sprayers; a plurality of arc-shaped plates are used for alternately blocking the pesticide discharging holes, so that stage pesticide liquid sup