Multi-layer foldable public packaging box

The utility model discloses a multilayer foldable public packing box, including device main part, bearing plate, water-resisting layer and limit stop dog, device main part surface middle one side is movably connected with the bearing plate, one side of bearing plate is fixedly connected with the movable groove, the middle part of bearing plate is movably connected with the connecting iron block, and the connecting iron block is fixedly connected with the movable groove. Magnetic connecting blocks are fixedly connected to the two sides of the interior of the connecting iron block, a water-resisting layer is fixedly connected to the middle of the interior of the device body, an elastic connecting layer is fixedly connected to the middle of the water-resisting layer, and a good waterproof measure can be taken through the water-resisting layer on the elastic connecting layer; and the bottom magnet is attracted to the water-resisting layer, so that displacement can be avoided, the stability of the device body is i