In today's architectural art, it has become increasingly important to maintain and protect national traditions and regional cultures and to creatively inherit architectural art. Different historical backgrounds, cultural contexts and different geographical locations produce different buildings. Excellent architectural art is only placed in the foundation of their respective national cultures and they are widely recruited and borrowed for innovation. If you do not pay attention to history, do not pay attention to cultural connotation and do not pay attention to the protection of building entities, the resulting architectural decoration design will affect the integrity and coordination of the building. This paper briefly describes the traditional architectural art and the national characteristics and cultural implication of architectural decoration art and discusses the application of traditional architectural decorative art in modern architecture.