The invention relates to a lifting welding guide rail, in particular to a lifting welding guide rail for welding aluminum foil. The lower portion of the lifting welding guide rail is supported by first movable angle iron and second movable angle iron on the left side and the right side, the first movable angle iron and the second movable angle iron can vertically slide on a first linear rail and a second linear rail respectively, the lower end of the first movable angle iron and the lower end of the second movable angle iron can roll on a first wedge block and a second wedge block through a first bearing and a second bearing respectively, the same sides of the first wedge block and the second wedge block are higher than the other sides, and the first wedge block and the second wedge block are connected through a gear rack. The welding guide rail can be correspondingly reduced by the thickness of the aluminum foil every time one layer is welded, then the aluminum foil on the next layer is welded, it is guaranteed that the aluminum foil on all the layers is at the same welding height and bears same welding force, and therefore welding is even, and the welding result is good.