Abstract: In view of the wide variety of indoor construction work sites and the complex and diverse work environment, it is impossible to receive GPS signals and therefore cannot accurately locate the construction personnel. It is easy to cause on-site workers to enter dangerous points by mistake. Operation risk management and control terminal equipment is designed, including smart helmets and indoors GPS. The positioning tag is integrated on the smart helmet, the base station is installed on the site where the operation is required, and the positioning of indoor operators based on UWB positioning technology is realized. Meanwhile, the smart helmet also has functions such as communication and behavior recognition, and the indoor positioning system has electronic fence and early warning functions. When a person is found to have crossed the boundary, a buzzer or other audio equipment is used to give an early warning, and the location information is transmitted to the platform at the same time, which strengthens safety control and reduces operational risks. The indoor precise positioning function, electronic fence and safety warning function are realized.