Communication box for Internet of Things engineering

The utility model discloses a communication box for Internet of Things engineering. Specifically, the invention relates to the field of Internet of Things, cOMPRISING A MAIN CASE FRAME, a first connecting frame and a second connecting frame are respectively arranged at the top and the bottom of the main box body frame; the first connecting frame and the second connecting frame are attached to theinner side wall of the main box body frame and are in sliding connection, limiting lantern rings are fixedly installed at the top and the bottom of the main box body frame through bolts, and the firstconnecting frame and the second connecting frame are inserted into inner cavities of the corresponding limiting lantern rings respectively. By arranging the first connecting frame and the second connecting frame, when the capacity in the box body is not enough, the first connecting frame or the second connecting frame is pulled, so that the inner cavity of the main box body frame longitudinally extends, the dissolved volu