Simple escape-proof trap of Drosophila melanogaster

The invention relates to a simple escape-proof trap of Drosophila melanogaster, comprising a hook, a container, a container cover, flypaper, and a fly attractant. The hook is fixedly connected to theupper end of the container cover; the lower end of the container cover is fastened to the upper end of the container; the bottom of the container is provided with a plurality of ducts; a spiral vane is arranged inside each duct; the fly attractant is arranged inside the container; the flypaper is arranged on the inner wall of the container. The simple escape-proof trap of Drosophila melanogaster is simple in structure; once Drosophila melanogaster enters the container from the lower end of one duct which has a large upper end and a small lower end, it is difficult for Drosophila melanogaster to fly out of the duct since an iron sheet is spirally arranged inside the duct; escaping of Drosophila melanogaster is prevented effectively, and fruits in an industry park are protected.