The invention discloses an aluminum-material decoration cover which comprises a cover plate. A left protruding part and a right protruding part are arranged on the left side and the right side of the upper surface of the cover plate and are bilaterally symmetric with respect to the central line of the cover plate, a vertical arm is further arranged on the upper surface of the cover plate and is provided with a clamping part, the vertical arm is located on the central line of the cover plate, the left protruding part, the right protruding part and the vertical arm are respectively and vertically connected with the cover plate, and the clamping part is vertically connected with the vertical arm. The aluminum-material decoration cover covers the upper end of an aluminum material in a shower room, is clamped with the aluminum material through the left protruding part, the right protruding part and the clamping part on the vertical arm, is convenient to dismount, attractive and elegant and can also prevent direct contact between the aluminum material and adverse factors such as temperature and humidity in the shower room, and the service life of the aluminum material is prolonged.