Soil biological disinfection device

The utility model discloses a soil biological disinfection device which comprises a push-pull rod, a walking wheel and a handheld handle are arranged at the lower end and the upper end of the push-pull rod respectively, a sliding sleeve capable of moving up and down along the push-pull rod is arranged on the push-pull rod, a positioning screw and a horizontal telescopic rod are arranged on the sliding sleeve, and the two ends of the horizontal telescopic rod can stretch outwards. Shaft sleeves are arranged at the two ends of the horizontal telescopic rod, rotating shafts are arranged in the shaft sleeves, spray head fixing rods are arranged on the rotating shafts, spray heads are distributed on the spray head fixing rods, rod sleeves matched with the spray head fixing rods are arranged on the spray heads, and rotary positioning devices are arranged on the shaft sleeves and the rod sleeves. The distance between the spray heads is consistent with the distance between the tobacco planting pits, and the spray hea