The invention discloses a vehicle rear combined lamp. The vehicle rear combined lamp comprises a lamp shell and a lens; the lens is tightly connected with the lamp shell, and includes an inner layer and an outer layer; a thermal insulating layer is arranged between the inner layer and the outer layer, and is a vacuum layer; a circulating device for forming internal circulation of gas in the lamp shell is arranged in the lamp shell, and includes a gas sucking pipe, a gas blowing pipe and a fan for connecting the two; a reflecting cup is arranged in the lamp shell, and is provided with a hole for passing through a light source; and the gas sucking pipe and the gas blowing pipe are both positioned in the hole of the reflecting cup, and are symmetrically arranged about the axis of the reflecting cup. The lens is set as two layers, so that the temperature difference of the inner and outer two sides of the lens is reduced, the fogging on the surface of the lens is prevented, and the influence on the effect of the lens by fog is prevented, and the driving safety is improved.