Analysis of regional comparative advantage about main crops in Liaoning province

According to the comparative advantage theory,based on the scale of production and production,this paper formed seven indices which were scale advantage indices(SAI),efficiency advantage indices(EAI) , aggregated advantage indices(AAI) variance, crop SAI,crop EAI, crop AAI of each city. The article analyzed production comparative advantages of Liaoning province each region 9 kinds of major crops. The results indicated that the main crop production in Liaoning province significant regional differences, Chaoyang, Jinzhou,Huludao, Fuxin, Fushun, Jinzhou, Dalian these city suitable for planting crops. And puts forward the Liaoning province shall according to the analysis conclusion，Adjust the plangting structure，Accomplish rational distribution of agricultural production and specialized production In order to give full play to regional the comparative advantage of agricultural production.