Line environment detection device

The embodiment of the invention provides a line environment detection device. The line environment detection device comprises a fixed seat and a detection mechanism, the fixing seat is provided with a mounting shell, and the mounting shell is provided with a first mounting cavity, a second mounting cavity and a third mounting cavity which communicate with one another; the detection mechanism comprises a temperature sensor, a smoke concentration sensor and a fan; the temperature sensor is mounted in the first mounting cavity; the smoke concentration sensor is mounted in the third mounting cavity; the fan is mounted in the second mounting cavity; the temperature sensor and the smoke concentration sensor are connected in series; a first channel is formed in the side wall of the first mounting cavity; a second channel is formed in the side wall of the second mounting cavity; at least part of the first channel corresponds to the air inlet end of the fan, at least part of the second channel corresponds to the air o