In today’s digital technology and the fusion depth under the background of society and economy，the infrastructure of a city can greatly promote the construction of urban industry and the optimization of the management level. According to the latest “Beijing promotes the development of digital economy innovation action outline（2020-2022）”. Beijing will be based on the “four centers” function orientation，transforming into an international digital metropolis and a benchmark city of global digital economy. Based on the history and current situation of digital infrastructure construction in Beijing，this paper conducts a multi-dimensional comparative analysis in combination with relevant data of major provincial and municipal cities in China，and puts forward optimization suggestions from the aspects of overall planning ideas and improvement of system standards.