DeFi is the abbreviation of Decentralized Finance, is a new soft industry that has recently grown in popularity. DeFi refers to financial activities such as trading, lending, borrowing, and saving that do not require the involvement of a centralized authority. Instead, the operations of DeFi are governed by Smart Contracts. With the continuous development and expansion of the Blockchain industry, making it the fourth revolution of humanity, DeFi also has been experiencing significant growth.