The utility model discloses a spray head device for an overhead bare conductor coating device, and belongs to the field of coating. The spray head device is formed by combining two semicircular and detachable split type spray head end pressing sleeves; a feeding hole is formed in the outer side of the end part of the split type spray head; the feeding hole correspondingly penetrates threading holes in the inner sides of the spray head end pressing sleeves through a feeding channel; a concentric circle structure relationship is formed between the threading holes of the split type spray head endpressing sleeves and the radial vertical section of a bare conductor; the inner walls of the threading holes of the spray head end pressing sleeves are provided with internal arc-shaped flow guide grooves; an annular polyurethane plate is arranged at the periphery of the threading holes of the spray head end pressing sleeves. Through the blocking of the polyurethane plate, the insulation coatingmaterial is prevented from flowing out of the inner side of the spray head end pressing sleeves, so that the insulation coating material is ensured to flow out of the coating end of the spray head endpressing sleeves uniformly, and a coating layer with uniform thickness is easily formed at the periphery of a bare conductor to be coated. The spray head device for an overhead bare conductor coatingdevice can be widely applied to the fields of overhead transmission line transformation and operation maintenance.