Abstract: Shuangyou No.8, a new semi-winter Brassica napus cultivar with high oil content, high quality, high yield, resistant to virus disease, tolerance to Sclerotinia Sclerotiorum and extensive adaptability, was bred by Institute of industrial Crops Henan Academy of Agricultural Sciences. The average yield was 2541.0 kg/hm2 in Henan province regional test of high quality, 20.67% higher than the check variety Yuyou No.2. Its yield was 2704.8 kg/hm2 in Henan province productive regional test of high quality, 7.06% higher than it out yielded the check variety Yuyou No.2. The seeds quality was very good in which near zero erucic acid in fat acid, 20.96 μmol/g glucosinolates in its meal, the oil content was 46.35%. Its high-yield can be obtained by sowing at right time, cultivating strong seedlings, rational density and application fertilizer and water management and disease, pest and weed control in time. It was registered and released in 2007. Shuangyou No.8 is a excellent cultivar with extensive use in agricultural production.