Promoting the deep integration of digital economy and real economy is an important historical task on China"s journey towards the second century goal. Based on the existing research, this paper identifies the relationship between digital economy and real economy and virtual economy, analyzes the three stages of integration of digital economy and real economy and the inner law, and makes a simple estimation of the degree of integration of digital economy and real economy. In the future, the promotion of the integration of digital economy and real economy in China needs to build and promote the use of arithmetic infrastructure to accelerate the digital transformation of enterprises; develop data factor market to let data flow; and guide platform enterprises to further integrate closely with the real economy.