The utility model relates to a simple line snapping device for a foundation column and a frame column. The pay-off rack belongs to the technical field of construction pay-off, specifically, the framehandrail is of a C-shaped structure; the two sides of the bottom of the frame handrail are each provided with a wire guide groove wheel; an ink box is fixed on one side of the frame handrail; a springwinding shaft is arranged in the ink box, a positioning insertion hole is formed in the other side of the frame handrail, an ink line is wound around the spring winding shaft, a positioning insertionrod is fixed to the free end of the ink line, the ink line bypasses the line guide groove wheel, the positioning insertion rod at the end is inserted into the positioning insertion hole, and the inkbox is simple in structure, convenient to use, suitable for single-person operation, time-saving and labor-saving.