The Lack of edible oil is a serious and long-term problem in China.I ncrease of oil plant production needs a large amount of land,which is limited by the land resources and grain production in a densely populated country like Chi na.After comprehensive study,the article proposes that rape planting will make e fficient use of fallow land in winter,and thus avoiding occupying land for grain and cotton production and beneficial for stable grain production.Rape planting is a good qchoice which matches our country's need.