Decoration structure for rear combined lamp

The utility model discloses a decoration structure for a rear combined lamp. The decoration structure comprises a lamp base, a vehicle metal plate and a decoration plate, wherein the lamp base is arranged on the vehicle metal plate through a screw pin, and a dome is arranged on the lamp base and is provided with a through hole; a convex rib is formed on the dome in an extending way in an upper direction, the bottom surface of the lamp base is provided with a groove in an outward extending way, and the convex rib and the groove are mutually staggered to form a clamping groove; the lower side of the dome is provided with a second groove; the decoration plate is sector-shaped, wherein the bottom of one end of the decoration plate is provided with a second convex rib, and the second convex rib is clamped on the clamping groove which is formed by mutually staggering the convex rib and the groove; and the other end of the decoration plate is provided with a clamp hook, and the clamp hook is clamped on the second gr