Moisture-removing and moisture-proof device for cable trench

The utility model relates to a moisture-removing and moisture-proof device for a cable trench. The moisture-removing and moisture-proof device is mounted on a cable trench cover plate. The moisture-removing and moisture-proof device comprises a moisture-proof shell, a ventilation hole penetrating through the thickness of the cable trench cover plate is formed in the cable trench cover plate, the moisture-proof shell is connected to the cable trench cover plate and is of a cavity structure with an opening in one end, and the opening end of the moisture-proof shell covers the ventilation hole and is provided with a first cavity communicated with the ventilation hole; the moisture-proof shell is further provided with at least one ventilation opening penetrating through the wall thickness of the moisture-proof shell, and the ventilation opening communicates with the first cavity and external gas. Through the arrangement, moisture in the cable trench enters the first cavity through the ventilation holes and then i