The present invention discloses a display rack for display and exhibition. The display device includes the display rack. Both sides of the display rack are provided with at least one insertion plate and insertion slot respectively, and the outer surface of the display rack is provided with at least one first item placement slot for exhibiting products. The upper side surface and the lower side surface of the inner surface of the display rack are provided with a connector and a groove respectively, the connector is provided with a first threaded hole, and the groove wall of the groove is provided with a second threaded hole. In the present invention, by modular design, a plurality of identical display racks are combined and superposed to form display devices of different width or height, less molds are used in production, so the production efficiency is increased, and production costs are reduced.