The national thinking mode is a historical achievement accumulated by a nation in a long process of material and spiritual practice, and it will have a significant impact on the formation of a nation's legal culture. Different national thinking modes that have been born in different civilizations have contributed to the huge differences between Chinese and Western legal cultures. The author starts from the different characteristics of causal and yin-yang thinking patterns, and analyzes the Chinese and Western legal and cultural aspects such as "developed law and chaos etiquette", "legal belief and legal instrumentalism", "law and law" The differences, in turn, have caused some thinking about transplanting western legal culture and realizing China's legal system modernization. <<