Special computer conveniently installed

The utility model relates to a special computer conveniently installed, which comprises a host computer and a display screen, wherein the casing of the host computer is provided with guide rails, and the back casing of the display screen is provided with ribs, or the casing of the host computer is provided with ribs, and the back casing of the display screen is provided with guide rails, wherein the shape and the dimension of the guide rail are matched with that of the ribs, and the widths of one ends of the cross sections of the rib and the guide rail far from the surface of the casing are larger than the widths of the ends of the cross sections of the rib and the guide rail close to the surface of the casing, and the display screen is fixed on the casing of the host computer through the mode of sliding the ribs into the guide rails. The special computer realizes the connection of the host computer and the display screen through the matching of the guide rails and the ribs, thereby simplifying the installati