It is suitable for improving the dry and wet rubbing fastness of denim garments, cellulose fibers and their blended fabrics, and can improve the rubbing fastness to level 1-1.5. It is easy to use, directly diluted and used; it has almost no effect on the hand feel, shade and light fastness after treatment; it does not contain formaldehyde and APEO, which is an environmentally friendly product.