The utility model discloses a floor trimming line, which is a strip-shaped auxiliary section for construction decoration, comprising a panel and an inserting tenon, the panel and the inserting tenon are pressed into a whole which can not be split, the radial cross section is very similar to a shape of T, the middle part of the upper surface of the panel is a plane, the two sides are slopes for closing; the inserting tenon is connected on the lower surface of the panel, and the bottom end of the inserting tenon is a sharp angle or an arc. The floor trimming line has convenient installation and good seam filling effect, thus being beneficial to the processing and the decoration of seams which are left by paving a wood floor by people, facilitating the cleaning and enhancing the aesthetics; in addition, the floor trimming line can adopt metal or PVC material for molding, the various colors can be used in the floors with the different colors, and the product which is produced by the elastic PVC is further beneficial to occasions when the floor seams are curves for usage.