The invention discloses a carbon fiber composite bonding surface preprocessing method. The carbon fiber composite bonding surface preprocessing method comprises the following steps that preprocessing is conducted on the carbon fiber composite bonding surface by adopting excimer laser; material molecules of the bonding surface are directly stimulated to an electron state through the excimer laser until chemical bonds of the material molecules are interrupted, so that the bonding surface produces etching phenomenon, and the microscopic rough surface is formed; and meanwhile, through latent light effect in the preprocessing process, the resin group activity of the carbon fiber composite bonding surface and properties of the carbon fiber surface are changed, thus preprocessing on the carbon fiber composite bonding surface is realized. The carbon fiber composite bonding surface preprocessing method improves the preprocessing quality and work efficiency of the surface of the fiber composite bonding surface.