Abstract: Today, Internet technologies, such as intelligence and information technology, have penetrated into various fi elds, including the fi eld of construction engineering. In most building construction processes, traditional construction methods and management methods have been gradually replaced by emerging technologies, such as artifi cial intelligence, information transmission, and virtual reality. In this context, it is an inevitable trend to introduce intelligent and informatized security risk early warning systems for areas with greater risks such as construction engineering. This article will analyze the application of security risk early warning systems on smart construction sites in construction projects, aiming to provide theoretical support and empirical guidance for the development of safety risk early warning systems for smart construction sites.