Carnival history and its evolution: Carnival is a unique cultural phenomenon in the western world, which is full of the essence from the Saturnalia Festival in ancient Rome to the later Carnival and April Fool's Day. However, this carnival life, which still occupied a huge position in people's lives in the Middle Ages, declined after the Renaissance. /kloc-after the 0/7th century, festival life was nationalized and turned into a celebration of crowing and dancing, and it was also a daily life. The essence and characteristics of carnival: Bakhtin's carnival theory is based on the division of two worlds and two lives. The first world is an official, hierarchical and orderly world. The ruling class has unlimited power, while ordinary people live a routine and cautious daily life. The second world is a carnival square life, a completely "upside down world" built on the other side of the official world. This is the world of ordinary people. If all non-ordinary classes want to live in the second world, they must give up all power, status and position in the first world. This is "the second way of life for people to temporarily enter the utopian kingdom where everyone is free, equal and prosperous".