The invention provides an anti-ultraviolet fabric fiber and a manufacturing method thereof. The composition includes waste wood products, bamboo, bagasse, cotton wool, talcum powder, zinc oxide, pottery clay, calcium carbonate and water. The waste wood products, bamboo, bagasse and cotton linters are crushed and mixed, the zinc oxide and calcium carbonate are crushed, the pottery clay is dried and crushed, the zinc oxide, calcium carbonate, pottery clay powder and water are mixed, stirred evenly, and finally the waste Wood products, bamboo, bagasse and cotton wool powder are added, then stirred evenly, dehydrated and dried, sliced, spun, wound and stretched to form fabric fibers. The cloth fiber made by the invention has excellent anti-ultraviolet function, is non-toxic and harmless to the human body, has good fiber toughness, high strength, wear resistance and high temperature resistance, and does not produce heavy feeling. The invention has low cost, simple manufacturing method, and The materials used are mainly environmentally friendly materials, which have certain environmental protection significance and meet the requirements of society's green development.