In　order　to　obtain　reasonable　aerodynamic　shape　of　shaped　bridge　decks,　the　buffeting　performances　comparison　of　a　cable-stayed　bridge　was　conducted　based　on　wind　tunnel　tests.　Firstly,　three　different　types　of　shaped　bridge　decks　were　designed　based　on　one　real　cable-stayed　bridge　with　a　main　span　of　300　m.　Secondly,　force　balance　and　vibration　sectional　model　wind　tunnel　tests　were　carried　out　to　obtain　aerodynamic　parameters　under　different　wind　attack　angles.　The　aerodynamic　parameters　include　three-component　static　wind　loading　coefficients,　flutter　derivatives,　etc.　Finally,　three　types　of　shaped　bridge　decks＇　buffeting　performances　were　compared　and　analyzed　by　considering　the　aeroelastic　and　buffeting　forces.　The　results　show　that　buffeting　responses　of　the　bridge　with　different　shaped　decks　are　different　from　each　other.　Buffeting　responses　in　any　one　freedom　could　be　changed　when　changing　bridge　deck　shape.　However,　the　optimal　influences　in　vertical,　lateral　and　torsional　directions　could　not　be　achieved　at　the　same　condition.　Reasonable　aerodynamic　shape　selection　of　shaped　bridge　decks　should　consider　the　mechanical　characteristics　and　the　performances　of　flutter,　vortex　and　buffeting.　©　2017,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.