Multi-layer packaging structure

The utility model provides a multilayer packaging structure, including: top plate, main cover body, buckle, box body and bottom plate, the lower end of top plate is equipped with main cover body, the lower end of main cover body is equipped with box body, the front end between box body and main cover body is equipped with buckle, the lower end of box body is equipped with bottom plate, main cover body includes upper card slot and sealing pad, and the bottom plate is equipped with the bottom plate. A sealing gasket is installed on the inner side of the upper clamping groove, the box body comprises a seat plate and a placement groove, an inner shell is installed at the upper end of the seat plate, an inner container is installed on the inner side of the inner shell, the placement groove is formed in the inner container, and an auxiliary cover body is installed at the upper end of the inner shell. Compared with the prior art, the human body proximity sensor packaging box has the advantages that the outer side of