With big data, Artificial Intelligence(AI) and Internet of Things(IoT) as emerging digital applications, the development of the digital economy has become an important opportunity for the economic take-off of developing countries. We estimate the influence of digital economic development on the marketization level of each province by constructing panel data of each province in China and using the fixed effect model. The result shows that every change in standard unit of digital economic development is positively promoting the marketization level by about 0.5%. We believe that the digitalization process is a process of promoting marketization process and releasing economic growth vitality in developing countries. Policy makers can reinforce the construction of digital infrastructure for big data and cloud computing, support the application of artificial intelligence and blockchain in traditional industrial sectors, and promote the overall development of the digital economy, so as to improve the marketization level and stimulate the vitality of the whole market and economic development potential.