3-Triethoxysilylpropylamine(KH550) film and KH550/graphene oxide(GO) composite film were prepared on aluminum alloy by Self-Assembly Moleculars(SAM). Surface morphology and microstructure of the samples were characterized by SEM, Raman and FITR. Corrosion potential and current density of the samples was also tested by the electrochemical workstation. The results showed that a condensation reaction took place between amino groups(-NH2) of KH550 and carboxy groups(-COOH) of GO, which made success combination of KH550 and GO. The adhesion ability of film was enhanced for the chemical reaction between film and aluminum alloy which led to the generation of Si-O-Al linkage. Moreover, the corrosion resistance of aluminium alloy was effectively improved by the two kinds of films.