A combined anti-slip floor mat, including a mat body and a little mat, the mat body includes a leather, a PU self-skinning layer, and an anti-slip layer stacked together m that order. A recess is disposed in the middle of the top of the mat body, and the area of the recess is slightly less than the top area of the mat body; the little mat is matched to the recess in size. At least one opening is disposed on the middle of each side of the recess; wherein the opening passes through the floor mat; a cross notch is made on the bottom of the floor mat, by connecting each two opponent openings; the size of the little mat matches the recess on the mat body, and is separably embedded in the recess.