The invention relates to a line drawing device, in particular to a quickly-stabilized type line drawing device of a traffic road marking line. The quickly-stabilized type line drawing device of the traffic road marking line is accurate in line drawing and high in line drawing speed and comprises first sliding rails, first sliding blocks, second sliding blocks, moving boxes, a lifting unit and the like. The front side and the rear side of the ground are each provided with one first sliding rail, the first sliding blocks and the second sliding blocks are slidably connected onto the first sliding rails, and the first sliding blocks are located on the left side of the second sliding blocks; and the tops of the first sliding blocks and the second sliding blocks are fixedly connected with the moving boxes, and openings are formed in the middles of the bottoms of the moving boxes. According to the quickly-stabilized type line drawing device of the traffic road marking line, the effects that line drawing is accurate, and the line drawing speed is high are achieved, in the line drawing process, side-to-side movement of the moving boxes can be completed only by means of the method that a motor is controlled by people, and therefore line drawing is more convenient and faster.