The friction coefficient tester is suitable for the packaging industry, papermaking industry, film manufacturers, packaging material testing institutions, etc. to measure the static friction coefficient and kinetic friction coefficient during sliding of plastic films, rubber, paper, cardboard, woven bags, wood, coatings and other materials. By determining the size of the friction coefficient, the smoothness, opening ease and uniformity can be judged, so that the production can be correctly guided and the production process can be controlled and adjusted.