In　recent　years,　UA　V　technology　has　been　developing　rapidly,　the　pure　orientation　passive　positioning　of　UAVs　in　formation　flight　is　a　hot　research　topic.　Based　on　the　circular　formation　formatted　by　10　UAVs,　a　＇UAV　three-point　positioning＇　model　is　given　to　find　the　position　coordinates　of　deviating　UAVs　using　angle　information;　research　found　that　3　UAVs　can　achieve　fuzzy　positioning　of　UAVs　when　the　UAV　index　is　unknown,　and　at　least　4　UAVs　are　needed　to　achieve　accurate　positioning.　Based　on　the　greedy　algorithm,　a　model　is　established　to　find　the　optimal　solution　by　multiple　iterations　using　the　＇UA　V　three-point　positioning＇　model,　the　MATLAB　simulation　result　show　that　the　error　value　is　10-25　and　basically　remains　constant　after　7　iterations,　which　can　be　considered　as　optimal　state,　and　the　optimal　adjustment　solution　is　given.　The　theory　that　＇if　a　convex　polyhedron　(convex　polygon)　formed　by　all　known　points　has　no　symmetry　plane　(axis),　the　desired　position　can　be　uniquely　determined　by　these　points＇　is　proved,　base　on　this　theory,　general　UA　V　location　and　position　adjustment　principle　of　any　formation　is　given.　©　2023　IEEE.