At present, China's digital economy is expanding, and the development of the digital economy is the engine to implement the new development concept, build a new development pattern and promote high-quality economic development. The digital economy is characterized by high innovation, high integration and high penetration. In the new round of technological and industrial changes, the driving force of the digital economy lies in innovation, and the factors of production of the digital economy are mainly big data, which can empower the high-quality development of China's economy through power change, efficiency change and quality change. The role of the digital economy to help China's high-quality economic development mechanism is reflected in the following aspects: digital economy can cultivate new dynamic energy for high-quality economic development, optimize resource allocation, and help upgrade the industrial structure. At present, the scale of China's digital economy continues to expand and the development speed continues to increase, but there are still problems such as imperfect infrastructure, poor integration of digital economy and real economy, digital industry in need of innovation, and insufficient supply of digital talents. In this regard, this paper proposes measures to strengthen infrastructure construction, promote the integration of digital economy and real economy, accelerate digital innovation, and strengthen the construction of digital talents in the process of industrial digitization and digital industrialization.