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In this study,a graphene oxide(GO)-polyethylenimine(PEI)-polyethylene glycol(PEG)graft copolymer wassynthesized.DOX loaded GO-PEI-PEG wasthen complexedthroughelectrostaticinteractionswith pH-responsive charge-reversible chitosan-aconitic anhydride(CS-Aco),low molecular weight PEIand short hairpin RNA(shRNA)to obtain the layered GO-PEI-PEG/DOX/CS-Aco/PEI/shRNAnanocomplex.