The invention discloses an outer support bundling type cultural relic repair method. Broken pieces different in damage degree are bonded and repaired into remnant blocks with different manners, a supporting support is manufactured through metal wires or other solid materials, the different remnant blocks are combined into a whole through the supporting support, and cultural relic repairing is finished. The cultural relic repair method is suitable for repairing ware serious in breakage deformation and large in incomplete area, the related rules of the law for the preservation of antiques are obeyed, repairing is conducted on the basis of the basic principle that original appearances of cultural relics are not changed and materials have reversibility, the cultural relics can achieve the exhibition and display effect, historical information on various cultural relic broken pieces is integrally reserved, the humanistic society information contained in the cultural relics at the time can bemore visually embodied during cultural relic exhibition, and insight of people to the modern history is further improved.