Piezoelectric-piezomagnetic　functionally　graded　materials　(FGM),　with　a　gradual　change　of　the　mechanical　and　electromagnetic　properties,　have　greatly　applying　promises.　Based　on　Legendre　orthogonal　polynomial　series　expansion　approach,　a　dynamic　solution　is　presented　for　the　propagation　of　circumferential　harmonic　waves　in　piezoelectric-piezomagnetic　FGM　cylindrical　curved　plates.　The　materials　properties　are　assumed　to　vary　in　the　direction　of　the　thickness　according　to　a　known　variation　law.　The　dispersion　curves　of　the　piezoelectric-piezomagnetic　FGM　cylindrical　curved　plate　and　the　corresponding　non-piezoelectric　and　non-piezomagnetic　cylindrical　curved　plates　are　calculated　to　show　the　influences　of　the　piezoelectricity　and　piezomagnetism.　Electric　potential　and　magnetic　potential　distributions　are　also　obtained　to　illustrate　the　different　influences　of　the　piezoelectricity　and　piezomagnetism.　Finally,　a　cylindrical　curved　plate　at　a　different　ratio　of　radius　to　thickness　is　calculated　to　show　the　influence　of　the　ratio　on　the　piezoelectric　effect　and　piezomagnetic　effect.　(C)　2008　Elsevier　Masson　SAS.　All　rights　reserved.