The invention provides a 5G monitoring-based safety helmet comprising a hat. The 5G monitoring-based safety helmet is characterized in that a hat brim is arranged on one side of the hat, mounting frames which are symmetrically distributed are arranged at two ends of the hat brim, earmuff devices are arranged on one sides of the mounting frames, mask assemblies are arranged in the earmuff devices,medical sensors are arranged on the other sides of the mounting frames, and one sides of the medical sensors are connected with an information management device; the hat further comprises an inner cavity, a protection device is mounted in the inner cavity, the protection device is installed above the mounting frames, and an alarm device is arranged below the protection device. According to the 5Gmonitoring-based safety helmet provided by the invention, the medical sensors and the information management device are combined, so that the physical condition of personnel is monitored in real time,accidents are avoided, and rescue is conducted in time when the accidents happen.