Explosion alarm device for intermediate joint of cable well

The invention discloses a cable well intermediate joint explosion alarm device, and relates to the technical field of safety alarm equipment. A smoke detector and a temperature detector are fixedly arranged on the top surface of the upper mounting box, and probes of the smoke detector and the temperature detector are arranged in the upper mounting box; the number of the anti-explosion box bodies is two, the anti-explosion box bodies are fixedly embedded in the upper mounting box and the lower mounting box respectively, and threading grooves are formed in the side walls of the anti-explosion box bodies. The jacking frame is fixedly arranged above the moving frame through a connecting rod, and warning light bars and buzzers are fixedly embedded in the side walls of the jacking frame; according to the cable well, explosion at a cable joint can be more accurately detected, damage of explosion to equipment and personnel inside and outside the cable well is effectively prevented, the safety of the cable well is gua