With the continuous development of big data technology in China, large-scale enterprises and financial institutions have established data center computer rooms due to the need to process massive amounts of data. Due to the electrical system of this engineering project is relatively complex, the application of construction technology will directly affect the subsequent construction quality and the safety of the data center. Therefore, this paper studies the construction technology of data center electrical engineering projects. Based on a simple analysis of the design and construction content of data center electrical projects, it discusses the key points of preparatory work. At the same time, it analyzes the difficulties and key points in multiple aspects such as wire piping, distribution box installation, and lamp installation during the installation and construction process of data center electrical projects.