As a result of the research project "Research on the Innovation of the Legal Theory of the Digital Economy" (2021-2023), this book systematically sorted out and integrates some important results of the project. Divided into six chapters, it discusses various issues around the following topics: "development of the digital economy and positive response by the developmental economic law", "institutional improvement of anti-unfair competition law", "anti-monopoly legal regulation in the digital age", "tax law incentives in the digital economy", "financial law guarantee in the digital economy" and "development the e-commerce industry and its legal protection in China".