The invention relates to an epoxy-resin surface bonding and repairing method. The method includes the steps that a carbon nanometer tube, epoxy resin and acetone are mixed to be even in the mass ratio of (1-2):(2-5):(90-110), and an epoxy-resin dilute solution is obtained; the epoxy-resin dilute solution is sprayed to a to-be-repaired surface multiple times, and a pretreatment layer is obtained; the epoxy and a curing agent are mixed to be even, the pretreatment layer is coated with the product till the epoxy is completely cured, and the epoxy-resin surface bonding and repairing is completed. According to the epoxy-resin surface bonding and repairing method, the epoxy resin with the added carbon nanometer tube is diluted with acetone, the mobility and the wettability of the epoxy resin are improved, and the carbon nanometer tube is completely coated by the epoxy resin and permeates into minimum gaps of a bonded or repaired surface, and the epoxy resin is cured through the diffusion effect of the curing agent; meanwhile, due to extruding, the small part of carbon nanometer tube in the gaps can enter post-covered epoxy resin, a gap-free and bubble-free bonding layer is formed, and the strength of a bonding interface is improved.