Fire monitoring device in cable trench

The utility model provides a device for monitoring fire in a cable trench, which comprises a plurality of arrayed cable racks, a plurality of layers of support plates are arranged on the cable racks, screw buckles are arranged at the tops and the bottoms of the cable racks, and a plurality of rotatable fire extinguishing nozzles are arranged on the cable racks; a plurality of cables are placed on the same-layer supporting plates of the plurality of array cable racks, the cable type temperature sensing detector is alternately connected with screw buckles at the tops and the bottoms of the plurality of array cable racks, and a central controller is arranged at one end of the cable type temperature sensing detector. And the cable type temperature sensing detector is alternately connected with the screw buckles at the top and the bottom of the plurality of arrayed cable racks. The space utilization rate of the cable type thermal detector is improved, and a lot of materials are saved. The fire extinguishing nozzle