The present invention is a poultry animal buckle structure which is disposed in a poultry and includes a housing and a radio frequency tag. The housing includes a receiving groove body, a fitting member and an elastic member. The receiving groove body includes a receiving space and a limiting portion, and the limiting portion has a limiting hole. The fitting is connected to the receiving groove. One end of the elastic member is connected to the receiving groove body, and the other end of the elastic member selectively penetrates the limiting hole and detachably connects the fitting. The radio frequency tag limit is set in the accommodating space, which is used to mark the livestock. When the elastic member penetrates the limiting hole and connects the fitting member, the elastic member has an arc shape and forms a through hole with the receiving groove body, so that the housing is positioned and positioned on the livestock through the through hole. Thereby, the engagement of the elastic member with the fitting member not only allows the diameter of the through hole to be freely adjusted, but also has a simple structure and convenient disassembly and assembly.本新型係一種禽畜環扣結構，其設於禽畜且包含殼體與無線射頻標籤。殼體包含容置槽體、嵌合件以及彈性件，容置槽體包含容置空間與限位部，限位部具有限位孔。嵌合件連接容置槽體。彈性件之一端連接於容置槽體，彈性件之另一端選擇性地貫穿限位孔且可拆卸地連接嵌合件。無線射頻標籤限位設置於容置空間，其用以標示禽畜。當彈性件貫穿限位孔並連接嵌合件時，彈性件呈弧狀並與容置槽體之間形成貫穿孔，藉以令殼體透過貫穿孔套接定位於禽畜。藉此，透過嵌合件搭配彈性件的卡合，不但可自由調整貫穿孔之徑長，亦具結構簡單及拆裝方便之效。
