The utility model discloses an intelligent safety belt capable of checking whether a person wears a standard safety belt or not. A safety belt belongs to the technical field of building construction and comprises a safety belt body, a control component, a flexible pressure sensor and an intelligent buckle, the control component, the flexible pressure sensor and the intelligent buckle are mounted on the safety belt body, and the control component comprises a master control module, a flexible pressure sensor data acquisition module, an intelligent buckle data acquisition module, a safety belt alarm module and a power module. The flexible pressure sensor data acquisition module is arranged in the flexible pressure sensor and is connected with the main control module through an RS-232/RS-485 serial data communication interface; the intelligent buckle data acquisition module is installed on an intelligent buckle, and the safety belt alarm module is connected with an alarm device. And the intelligent buckle data acquisition module and the safety belt alarm module are respectively connected with the main control module. According to the utility model, the use condition of the safety beltof high-altitude operation personnel can be checked in real time, the danger coefficient of the high-altitude operation personnel is reduced, and construction specification management is facilitated.