Abstract: In this paper, the bonding surface of domestic T800 carbon fiber/high toughness epoxy composites was modified by grinding, sandblasting and plasma treatment. The test pieces of J-116B and J-375 adhesive films on floating roller peeling and tensile shear properties were prepared, respectively. The peel and shear properties of the J-116B and J-375 adhesive films were tested under different treatment conditions. The morphology of the samples before and after aging, without etching and after etching were observed by SEM. The contact angle tester was used to test the influence of different surface treatment methods on the wettability of the domestic T800 carbon fiber/high toughness epoxy composites bonding surface, and XPS was used to study the surface physicophysication performance of domestic T800 carbon fiber/high toughness epoxy composites before and after plasma treatment. The results show that J-375 film has better hygrothermal aging property although its room temperature peeling property is not as good as that of J-116B film. The failure mode of plasma treated domestic T800 carbon fiber/high toughness epoxy composites changed from adhesion failure to cohesive failure, so that the tensile shear and peel properties of the two films are significantly improved. This is because plasma treatment can recombine the molecular chain on the surface of the composite and form new active groups on the bonding surface.