The present invention is composed of a light penetrating body, a light shielding mask and a light penetrating ring frame. The body has an inner surface surrounding a longitudinal axis and an outer surface opposite to the inner surface, such that the inner surface defines a control and prevention zone. The light shielding mask is fixed along a top end of the body and protrudes out of the body in an eaves shape. The light shielding mask further defines a porch with an opening facing downward, and controls the porch to have a sufficient light shielding depth. The ring frame is connected to the porch in a suspending manner, so that a blocking zone is maintained among the ring frame, the porch and the outside of the body. As a result, when ants enter the porch along the outside of the body, a first optical difference configuration is formed between the porch and the light penetrating body, and a second optical difference configuration is formed between the porch and the light penetrating ring frame, so as to double confuse the ants in phototaxis and fuzzy vision thereby making the ants get lost in the blocking zone and thus eliminating the intrusion of ants into the control and prevention zone.本發明係以可透光胴體、遮光罩及可透光環框組成。前述胴體具有環繞縱軸之內面，以及相背內面之外面，令前述內面界定出一防治區。遮光罩係沿著胴體頂端固定，且呈屋簷狀的突出胴體外面，此遮光罩更界定出一開口朝下之迴廊，並控制該迴廊具有足夠之遮光縱深。環框則是呈懸空的接設於迴廊，令環框、迴廊與胴體外面三者之間保持一阻隔區，藉此，使螞蟻沿著胴體外面而進入迴廊時，令迴廊與可透光胴體間形成第一道光差配置，以及使迴廊與可透光環框間形成第二道光差配置，用以雙重迷惑螞蟻趨光性及模糊視覺，使螞蟻在阻隔區迷路，以達杜絕螞蟻侵入防治區之技術者。
