With the increasing scale and complexity of nuclear power project construction, there is a high demand for construction technology from construction enterprises. Efficient, safe, and accurate construction is an unavoidable problem for Power plant project. Digital twin technology, as an emerging means of information management, provides a new solution for synchronous construction of Power plant project by highly integrating virtual models with real physical spaces. This article will explore the application of digital twin technology in synchronous construction of Power plant project, including its basic principles, technical architecture, and the advantages and challenges it brings.