The present invention is a wireless positioning bird foot ring with a flexible circuit board, comprising: a casing, a flexible circuit board, a radiator circuit, an opening detection recording device and a waterproof leakage preventing component. The radiator circuit, the opening detection recording device and the waterproof leakage preventing component are all disposed on the flexible circuit board. In this way, the flexible circuit board can withstand the maximum degree of bending, and can prevent the disadvantages of the recording and detecting device through the opening and closing, and then the setting of the waterproof and anti-leakage component makes the circuit operation more stable, thereby improving the life and practicality of the product. Sex.本創作為一種具有軟性電路板的無線定位鳥類腳環，包含：一外殼、一軟性電路板、一輻射體電路、一開闔偵測紀錄裝置及一防水防漏電元件。將輻射體電路、開闔偵測紀錄裝置及防水防漏電元件都設置在軟性電路板上。藉此，使軟性電路板能夠承受最大程度的彎折性，更能透過開闔偵測紀錄裝置防弊，再搭配防水防漏電元件的設置，讓電路運作更穩定，以提升產品的壽命及實用性。
