The utility model discloses a power switch cabinet dust removal dehumidification integrated device, including box body, electrostatic precipitator, dehumidifier and fan, electrostatic precipitator, dehumidifier and fan are installed inside the box body, and the dehumidifier lies in between electrostatic precipitator and the fan, and the dehumidifier includes first radiator, first sponge, semiconductor cooler, second radiator, plastic funnel, second sponge and dehumidifier fixed plate, fixed apron is installed at the box body top, and the bottom plate is installed to the box body bottom, the box body surface still set up with the corresponding wind window in fan air -out position, the utility model discloses a both coordinate electrostatic precipitator and dehumidifier mutually and the cooperation in structure and function, finally realize removing dust and the dehumidification function.