Abstract: The original rolling process for φ190 and φ200 mm stainless steel bars produced at Special Steel Co, Benxi Steel was by 800 primary mill blooming and finish-rolling from 3. 16 t ingot, by which the output of rolling products per hour was lower and the bars were easy twisted and scratched. At present the optimization process is used by 800 primary mill blooming ingot to 206 mm and 217 mm billet then by 650 continuous rolling mill finish-rolling to φ190 and φ200 mm bar products with square-oval-round pass series, by which the quality of products increases and the output increases from original 35 t/h to 55 t/h.