supertree　is　a　connected　and　acyclic　hypergraph.　The　set　of　r-uniform　supertrees　with　n　vertices　and　the　set　of　r-uniform　supertrees　with　perfect　matchings　on　rk　vertices　are　denoted　by　T-n　and　T-r,T-k,　respectively.　H.　Li,　J.　Shao,　and　L.　Qi　[J.　Comb.　Optim.,　2016,　32(3):　741-764]　proved　that　the　hyperstar　S-n,S-r　attains　uniquely　the　maximum　spectral　radius　in　T-n.　Focusing　on　the　spectral　radius　in　T-r,T-k,　this　paper　will　give　the　maximum　value　in　T-r,T-k　and　their　corresponding　supertree.