Internet of Things door magnetic alarm device

The utility model discloses a door magnetic alarm device based on the Internet of Things. The door magnetic alarm device based on the Internet of Things comprises an alarm and a magnetic attraction device, the alarm sequentially comprises an alarm box upper box, a circuit board, an alarm box bottom box, a battery assembly and a battery cover from top to bottom, the alarm box upper box is of a box-shaped structure with the upper end closed and the lower end open, the upper side and the lower side of the alarm box bottom box are connected with the alarm box upper box and the battery cover respectively, and the upper surface of the alarm box bottom box is provided with a platform protruding outwards. The upper surface of the platform is used for installing a circuit board, the lower surface of the platform is provided with an inwards-sunken battery containing cavity, and the battery assembly is installed in the battery containing cavity; the magnetic attraction device sequentially comprises a magnetic attraction