The authors consider the theoretical and practical problems of the formation and functioning of digital infrastructure. The concept of digital infrastructure is open to discussion in terms of the composition of elements and the nature of emergence. This research explores the multifaceted concept of digital infrastructure, encompassing network technologies, software and hardware, network management, human resources, digital products, and digital organizational culture. The legal support for digital economy infrastructure is closely tied to the pace and nature of its development. The research emphasizes the complex nature of digital infrastructure and the need for a comprehensive analysis of the factors driving its evolution. These factors include technologies, software, products, human capital, pricing, financial institutions, competition, smart city development, and environmental protection. The research examines the use of digital infrastructure in the economies of China, Singapore, and the EAEU countries and concludes with an assessment of national digital infrastructure systems. The primary aim of this research is to analyze the fundamental legal requirements for supporting digital economy infrastructure, focusing on national priorities, international best practices, public–private partnerships, collaboration among science, business, and society, and the need for realistic, flexible, and balanced approaches.