Abstract: The 5th generation mobile network (5G) is a revolution of technology, and surely will promote significant innovations in various industries. At present, 5G has been applied in intelligent manufacturing, telemedicine, intelligent driving and other fields, but there is no mature application case of 5G in the field of urban emergency management. The 5G-based smart emergency command platform proposed in this article adopts basic capabilities of 5G, including the internet of everything, large bandwidth, low latency, edge computing, and network slicing to build a ubiquitous perception, responsiveness, intelligent handling, information sharing, stable and reliable emergency command platform, which can effectively improve urban risk prevention and emergency response capabilities.