The invention relates to a viscose staple fiber with high white strength and fine denier and a production process thereof, which belong to the viscose staple fiber and the production method of the textile spinning industry and the non-woven fabric industry. Its raw materials and weight percent content are: 86.7-92 percent of cellulose fiber, 7.7-13 percent of water, and 0.15-0.30 percent of oil agent. The raw materials are impregnated, squeezed, yellowed, spun, drawn, bundled, scoured, bleached twice with hydrogen peroxide, and dried to make finished products. The product of the present invention has finer denier, higher strength, higher yarn count and higher strength, and the garment fabric has higher strength, strong abrasion resistance, delicate hand feeling, wrinkle resistance and resistance to multiple deformations than ordinary viscose of the same process. Short fiber processing clothing fabrics and other advantages. High-count yarn products have thinner fabrics and lower grammage. The area of fabrics processed from raw materials of the same weight is increased and the cost is reduced.