Abstract:Ancient buildings are a very valuable cultural heritage of the motherland, and it is a glorious and arduous task to do a good job in maintenance and protection. For different maintenance objects, deeply understand the spiritual essence of the "Cultural Relics Protection Law", carefully grasp the repair principle of "not changing the original state of cultural relics", so as to take the correct maintenance methods and technical measures, in order to achieve more ideal results. Based on the lessons learned over the years, in order to do a good job in the protection of ancient buildings, this paper proposes several working methods that can be used as a reference for practitioners.