The　applications　of　the　new　graphene　platelet　reinforced　functionally　graded　(GPR-FG)　composite　materials　are　helpful　to　improve　the　overall　performance　of　the　rotating　blade.　However,　the　new　GPR-FG　rotating　composite　blade　may　produce　the　strong　nonlinear　vibrations　under　the　coupling　effects　of　the　aerodynamic　force　and　disturbed　speed,　which　are　one　of　the　main　reasons　leading　to　the　overall　failure　of　the　rotating　blade.　Therefore,　it　is　of　great　value　to　analyze　the　nonlinear　dynamics　of　the　GPR-FG　rotating　composite　blade　under　the　aerodynamic　force　and　varying　speed.　Based　on　the　nonlinear　dynamic　model　of　the　GPR-FG　rotating　composite　blade,　the　resonant　responses,　global　bifurcations　and　double-parameter　multi-pulse　chaotic　vibrations　of　the　rotating　composite　blade　are　studied　for　the　first　time.　The　prediction-correction　continuation　algorithm　is　used　to　obtain　the　amplitude-frequency　response　curves　and　force-amplitude　curves　of　the　GPR-FG　rotating　composite　blade.　It　is　found　that　there　are　the　sudden　changes　in　the　resonant　responses　and　complex　nonlinear　vibrations　in　the　GPR-FG　rotating　composite　blade.　The　extended　Melnikov　method　is　applied　to　study　the　global　bifurcations　and　double-parameter　multi-pulse　chaotic　vibrations　of　the　GPR-FG　rotating　composite　blade　under　the　coupling　excitations　of　aerodynamic　force　and　disturbed　speed.　Through　theoretical　analysis　and　numerical　simulation,　we　find　that　there　are　the　complex　double-parameter　multi-pulse　chaotic　vibrations　of　the　GPR-FG　rotating　composite　blade.　These　results　have　the　theoretical　significance　for　the　safe　operation　of　the　new　GPR-FG　rotating　composite　blade.　(c)　2022　Elsevier　Ltd.　All　rights　reserved.