The utility model discloses a live working personnel safety early -warning device, including power module, sensor module, controller module, communication module and alarm module, the power module power supply, sensor module acquires live working personnel's data message and uploads the controller module, safety precaution is carried out according to the data message to the controller module to report to the police the while general through alarm module early warning device's working parameter and information are externally sent through communication module or communication module receives the control information that external equipment sent early warning device and sends the controller module to. The utility model discloses can effectively carry out safety precaution during live working, instruct work worker's safety in production, workman's life safety in the assurance live working environment.