The invention discloses a shell component of a cabinet air conditioner, the cabinet air conditioner and a processing method of a panel component. The shell component comprises a rear shell, a surface frame and the panel component, wherein the surface frame is arranged on the front side of the rear shell; an air outlet is formed in the surface frame; the panel component comprises a plurality of arc supporting panels and a plurality of acrylic panels which are formed through hot bending processing; the supporting panels are arranged on the front side wall of the surface frame; at least two supporting panels are arranged at an interval to expose the air outlet; the acrylic panels correspond to the supporting panels one by one and are matched with the supporting panels in shape; and each acrylic panel is stuck to the front surface of the corresponding supporting panel through a back adhesive. The shell component of the cabinet air conditioner is simple and reliable to assemble, the assembly efficiency is favorably improved, and the cost is reduced; meanwhile, the acrylic panels formed through hot bending processing facilitate the improvement of the matching reliability between the acrylic panels and the supporting panels, and the acrylic panels are attractive in appearance.