Based on the data of long term development in cereal production of national experimental demonstrative site in the loess plateau,the author suggests that cereal yield of 800 millions kilogram could be increased in Weibei area of Shaanxi province.The yield of unit area can reach 3750kg/hm² for wheat,6750kg/hm² for corn and 4050kg/hm² for cereal.And three approaches for increasing yield are suggested.The author points out clearly that barn target is not appropriate for Shaanbei area.The appropriate target should be eco-agriculture construction and more than selfsufficient for cereal production in this area based on the agricultural ecoenvironment condition.