Currently, China's economy is developing rapidly. Since the introduction of the "new infrastructure" policy, the construction of new infrastructure with digitalization as its core will effectively promote the development of China's digital economy. This paper analyzes the internal relationship between the new infrastructure and the digital economy from the perspective of "new infrastructure". At the same time, it analyzes the current development status of the "new infrastructure" and three reflection indicators including the data center, charging piles and the science and technology park. Finally, by summarizing the indicators related to infrastructure in the current digital economy research, and combining the benefits of investment and output, a "new infrastructure" development degree evaluation index system is constructed.