Switch cabinet dehumidification system

The invention provides a switch cabinet dehumidification system, which comprises multiple groups of switch cabinets and a switch cabinet dehumidification device which is connected with the multiple groups of switch cabinets, wherein the switch cabinet dehumidification device is arranged outside the switch cabinets; the switch cabinet dehumidification device comprises an air supply unit communicated with the outside air, a drying unit, air guide pipes which connect the air supply unit and the drying unit, air inlet pipes and air outlet pipes; the air inlet pipes and the air outlet pipes are communicated with the switch cabinet separately; the air supply unit provides air; and the air is dried by means of the drying unit, then enters the switch cabinets by means of the air inlet pipes and exhaust humid air in the switch cabinets by means of the air outlet pipes. By arranging the switch cabinet dehumidification device outside the switch cabinets, the power supply does not need to be cut off and the switch cabine