Abstract: This paper studied the influcnce of thermal cxposure,thermal cycle,matrix alloys,degree of rough surface and kinds of fiber on corrosion resistance of carbon-aluminium composite. The results indicate that the interfacial corrosion between carbon fiber and aluminium is aggravated and the corrosion resistance of carbon-aluminium composite deteriorated after exposing when carbon-aluminium composite was immersed in distilled water or 3.5% NaCl solution,and thermal cycle has a little effect on corrosion resistance of carbon-aluminium composite, rough surface has dctrimental effect on corrosion resistance of carbon-aluminium composite,carbon-aluminium composite is stronger than carbon-6061A1 composite and graphite-aluminium composite is stronger than carbon-aluminium composite on corrosion resistance.