PLC control box convenient to overhaul

The PLC control box comprises a box body, the box body comprises a frame body with the two sides open, the open ends of the two sides of the frame body are each provided with a vertically-arranged opening and closing door, and the upper end and the lower end of the inner side wall of each opening and closing door are fixedly connected with a plurality of upper horizontal rods and a plurality of lower horizontal rods respectively. The upper horizontal rods and the lower horizontal rods are slidably connected with the inner side wall of the frame body, a transmission cavity is formed in the lower side wall of the frame body, a horizontally-arranged threaded rod is rotationally connected into the transmission cavity, the directions of threads on a left half rod and a right half rod of the threaded rod are opposite, and the left half rod and the right half rod of the threaded rod are sleeved with inner threaded cylinders in threaded connection with the threaded rod respectively. The cleaning device has the advant