Abstract:This article comprehensively discusses the importance of protecting ancient buildings, which plays a very important role in improving and enhancing people's awareness of cultural relics protection and promoting the protection of cultural relics in China. Ancient architecture is an extremely important part of the relics of ancient material culture and an important one in the protection of cultural relics. The main reason is that the function of the building is not only as a material material for production and life, but also as a political expression, art appreciation, and historical witness in the ideological field of the superstructure. The reasons for protecting ancient buildings are (1) ancient buildings are physical objects that inspire patriotic enthusiasm and national self-confidence; (2) ancient buildings are physical examples for studying various historical sciences; (3) ancient buildings are important references for new architectural design and new art creation; (4) ancient buildings are good places for people's culture and recreation, and are an important material basis for carrying out tourism; it is necessary to take the physical objects left over from ancient history as physical examples for studying historical science, and the experience accumulated by the ancient working people as a reference for today's construction. In a word, it is: "The ancient is used for the present."