With the continuous development of economy and society, the concept of people-oriented has been widely popularized and deeply recognized, which is in sharp contrast with the current frequency of urban construction safety accidents. Meanwhile, the rapid development of new generation information technology, such as IoT, big data, cloud calculation, and ICT, has strongly promoted the transformation of productivity and production relations in various industries.Online collaboration of production organizations has already become the norm, and management tools for quality and schedule management are normally BIM-based, while the management concepts and tools for security are still relatively backward. This paper proposes a concept of urban space facilities construction, and studies the construction of a big-data basement of urban security risk management, which integrates security management risk theory, big data theory, platform theory, and etc. An intelligent management platform for safety risk of urban space facilities construction is established based on big data, so as to achieve the informatization and modernization of security management of urban space facilities construction, and to support the security management decision of urban construction