Abstract: The studies on effects of planting dates to yield and quality of B.juncea Czern Coss.Spring rape were conducted.The results showed that mid-April to early May sowing could not only increase the spring rape yield but also improve the quality and induced the incidence of the spring rape.Delayed sowing, the post of growing meet the hot and rainy weather, incidence of spring rape obvious increased,seriously affect the yield and quality.but,because the temperature rise,emergence speed up,Timely sowing in the local is one of the measures to ensure high yield production.