The utility model discloses a stone stair anti-skid closing-in bar, which is a metal section bar, comprising a panel and a tenon bar, wherein the structural characteristics of the utility model are that cross section of the panel is in a shape close to a 'vertical curved hook' shape in the Chinese strokes and includes a flat surface and an arc surface; an outer surface of the flat surface portion is provided with an anti-skid tooth portion with wider area, and a corner is designed by the arc surface without edges and corners; and the top of the arc surface is equipped with a wave tooth slot adapting to be assembled and fixed by using grout, and certain concave-convex alternate protruding bars and tenon bars, and the main edge employs an inclined surface to close up, thereby being unable to leave a ridge easy to trip the person after being assembled. The utility model has the advantages of assembling conveniently and firmly, having good anti-skid effect, and having no use for taking time and labor to additionally process the stone ornamental brick.