| Grading of quality of arable land is one of vital issues of land resource inspection in China,which is significant meaningful to food security, arable land protection and improving incomes and quality of life. The confirmation of standard farming system is the groundwork of Grading of quality of arable land. Firstly, standard farming system is a vital reference for classification index. Secondly,standard farming system reflects theoretical production of arable land in a certain extent and guides the selection of crops.Existing partition of standard farming system is not quite reasonable,which means room for improvement remains. This article tried to set up a improved plans of partition of standard farming system of Riparian plain area along Changjiang river in Hubei province meticulously.By consulting domestic and foreign literature,analyzing research of arable land quality grading from scholars and experts,this article conclude the third stage of standard farming system,which can be electable scheme by factor method on arable land quality grading.standard farming system is effected by moisture, economic, restrictive,topographic factors and condition of light temperature farming technique also. Index system is bulid on light and temperature potential productivity, restrictive factor, social and economic conditions.K-means clustering, Hierarchical clustering, Moran’s I and Getis-Ord Gi* are used for analysis data and preliminary partition plans.This paper also reports the grain security status.Contrasting the preliminary partition plan and current standard farming system to revise the plan.Conclusion:1.Final partitioning scheme goes to seven sectors. These sectors show different characteristics. Land consolidations must be adjusted beneath it.2 .There are certain loopholes in the current standard farming system and further improvement is needed. |