The protection of historic buildings is one of the important tasks to promote the development of modern civilization, which is also of great significance to the development of contemporary architecture. All countries in the world attach great importance to the protection of historic buildings. There are still many problems in the protection of historic buildings in China, and it needs further improvement. This paper takes the historical and cultural district of Jiangzi city in the southwest of Tibet autonomous region as an example, analyzes the present situation and problems of historic building protection in China and gives some suggestions.