Distribution box convenient for periodic maintenance

The utility model relates to the technical field of distribution boxes. The utility model relates to a distribution box convenient for periodic maintenance. Including a housing, a threaded rod is vertically inserted into the bottom surface of the shell through an opening; a bearing plate is movably mounted in the shell; the bottom surface of the bearing plate is connected with the threaded rod; connecting plates are installed at the four corners of the bearing plate. The connecting plate is also connected with a bolt; the bolt is horizontally inserted into the bottom of the mounting plate through the opening; the end part of the bolt is in threaded connection with a nut; a heat dissipation opening is formed in the middle of the bearing plate; a filter screen is laid on the heat dissipationopening; a dustproof cover is hinged to the top of the shell. When the distribution box is maintained, only the dustproof cover needs to be opened, the positioning nut needs to be rotated to move downwards, the shell can be