The invention discloses a construction decoration portable ladder which comprises a main plate. The main plate is of a cuboid structure, and three vice plates which can be folded in the up-down direction are arranged on the two sides of the main plate in a hinged mode. The lower ends of the three vice plates are each provided with two detachable supporting columns to be matched with the ground inan abutting mode to improve stability. The vice plate at the uppermost end is further provided with two supporting rods which are arranged in a spaced mode. A cross rod is arranged between the two supporting rods to be fixedly connected with the two supporting rods, and the upper end of the cross rod is further provided with a worktable moving in the length direction of the cross rod. According tothe construction decoration portable ladder, moving is convenient, the worktable is further arranged, thus tool storing is facilitated when a worker operates on the worktable, and the operation strength of the worker is reduced; and the construction decoration portable ladder has the folding function and is convenient to carry accordingly.