"Cultural Explosion"is an important concept in Yuri Lotman's later cultural semiotics.The theory of cultural explosion,formed around this academic keyword,represents the consummation of his thoughts during the last decade of his academic career and is a crucial component of his cultural semiotics theory.Culture and Explosion and Unpredictable Workings of Culture are representative works of Lotman's theory of cultural explosion,and their related discussions have become a new focus in international Lotman studies and cultural studies.They also represent a research gap that urgently needs to be filled in our country's Lotman studies.The theory of cultural explosion encompasses many important cultural issues,including the relationship between cultural explosion and historical processes,gradual change and explosion,and the unpredictable workings of cultural explosion.These questions are of great academic and intellectual value and have important enlightening significance for today's society undergoing significant cultural transformations.