Fire safety early warning device

The utility model relates to the technical field of fire-fighting early warning equipment, in particular to a fire-fighting safety early warning device which is provided with an annular body, N smoke sensors are arranged on the outer side of the annular body, and the N smoke sensors comprise one normally-open smoke sensor and N-1 normally-closed smoke sensors; a first annular groove is formed in the inner side of the annular body, a switch controller corresponding to each normally-closed smoke sensor is arranged in the first annular groove, and the switch controller is electrically connected with the corresponding normally-closed smoke sensor; the switch controllers divide the first annular groove into N-1 sliding sections, a switch assembly is arranged in each sliding section in a sliding mode, and the switch assemblies are electrically connected with the adjacent switch controllers. According to the utility model, through the cooperation of the normally-open smoke sensor and the normally-closed smoke sensor