Dustproof ventilation cover

The dustproof ventilation cover comprises a body and a plugging piece, the body is provided with a containing cavity used for containing devices, a groove is formed in the top wall of the body, and the groove communicates with the containing cavity through a first opening; the blocking piece is connected with the top wall of the body and blocks at least part of the structure of the groove, and the groove is communicated with the outside through the second opening; the first opening and the second opening are staggered in the thickness direction of the top wall. Other positions, except the second opening, of the groove are blocked by the blocking piece, so that external dust is prevented from directly entering the containing cavity from the first opening. The first opening and the second opening are staggered in the thickness direction of the top wall, dust entering the groove through the second opening can flow to the first opening only by passing through the groove extending in the plane perpendicular to the thickness direction of the top wall, and due to the fact that the groove has a certain extension length, the risk that the dust enters the containing cavity can be reduced; and the dustproof effect of the dustproof ventilation cover is improved.