Automatic trapping and killing device for harmful insects on earth surface

The utility model discloses an automatic trapping and killing device for harmful insects on the earth surface, which comprises a protective cover, a fence is arranged on the protective cover, the fence is arranged on the periphery of a round hole, the fence surrounds the round hole in the center, a liquid storage bottle is arranged above the round hole, the length of a bottle body of the liquid storage bottle is 100mm, and the length of the bottle body of the liquid storage bottle is 100mm. The length of the bottle bottom of the liquid storage bottle is 60 mm, the length of the bottle opening of the liquid storage bottle is 42 mm, sugar bait composed of sugar water and borax is arranged in the liquid storage bottle, a connecting block is arranged below the fence, a round hole is formed in the middle of the connecting block, a base plate is arranged at the bottom of the round hole, protrusions are arranged on the two sides of the base plate, the length of the base plate is 100 mm, and the length of the liquid