The invention discloses a reading word number measuring ruler, which is composed of a reading word number measuring ruler body and an attachment magnetic panel, wherein the reading word number measuring ruler body is formed by connecting patches in series by a rope, the patches are made of an iron material, the number of the patches is 100, the patches are 5# font in size and of a flat square structure, and a corner design can be adopted; the center of each patch is provided with a tubular duct, and the rope penetrates through the tubular duct; rope ends at both ends of the rope are of a knot-shaped structure so as to prevent the patches from falling off and dropping out from the rope; the upper surface and the lower surface of each patch are provided with a numerical symbol, and the 100 patches are sequentially marked by the numbers 1-100 from beginning to end. When the reading word number measuring ruler is used, the patches sequentially cover upon words on a book page with one patch covering one word, when the last word is covered, and the word number required to be calculated can be acquired by only glancing the numerical symbol of the patch covering on the last word, thereby avoiding a defect that a mode of counting in words and calculating in the heart is easily to be interfered by the environment. The reading word number measuring ruler is novel in method and convenient to use.