Small-sized internet of things switch

The utility model discloses a small-sized internet of things switch, relates to the technical field of internet of things products, and solves the problems of complicated wiring and the like in some scenes. The null line interface is arranged on one side close to the bottom of the inner cavity, and the live line interface is arranged on one side closer to the cover body than the null line interface; an installation cavity is formed in the relay and penetrates through the bottom face of the relay in the thickness direction, and the cavity bottom of the inner cavity of the main shell covers a cavity opening of the installation cavity. The internal rearrangement layout design is carried out, in some wiring scenes, a live wire lead and a zero wire lead do not need to be connected by bypassing an interface, the leads can be directly connected with adjacent corresponding interfaces, the wiring mode is simpler and clearer, the possibility of wrong lap joint is reduced, and reasonable layout of circuit design in the