Abstract: With the rapid development of digital economy, it is necessary to pay high attention to the security risks in the development of digital economy and the early warning and prevention of risks. Digital economy security risks refer to the possible problems in various information data, technologies, industries and government governance that affect the development of digital economy, as well as a series of hidden dangers that cause the development of digital economy to deviate from the stable and healthy state. The development of digital economy may cause security risks from the five levels of the country, society, industry and enterprise. The early warning of security risks in the development of digital economy is constructed from the above five levels and the warning circle. Focusing on the needs of risk prevention in the development of digital economy, various prevention mechanisms should be adopted for risks at different levels, including measures from data, network, laws and policies. Collaborative governance, government digital transformation; Regional balanced development of digital economy, construction of high-quality employment system, increase investment in education; Monopoly prevention means, enterprise business model improvement; Multi-department cooperation, multi-line simultaneously.

Key words: digital economy development, security risk, risk early warning system, construction of prevention mechanism