Fertilizing device capable of conveniently controlling flow

The utility model discloses a fertilizing device capable of conveniently controlling flow. The discharging device comprises a discharging box, a discharging opening is formed in the middle of the bottom end of the discharging box; two sides of the bottom end of the discharging box are fixedly connected with a group of water storage tanks; a roller is arranged in the middle in the discharging box;two sides of the top end in the discharging box are fixedly connected with a group of spray heads; the upper end of the discharging box is connected with a feeding box in a penetrating mode. A first servo motor is fixedly connected to the middle of the top of the feeding box. The bottom end of the first servo motor is connected with a storage box through a shaft rod, feeding pipes are arranged onthe outer side of the bottom end of the storage box at equal intervals, the bottom ends of the feeding pipes are in contact connection with the upper ends of baffles connected with the inner bottom end of the feeding box throu