Abstract: [Objective]By taking the newly increased grain production capacity field project in Shimen County of Hunan Province as an example, the farmland fertility of the pre-construction and post-construction in the construction area conducts the integrated evaluation. [Method]A total of 10 evaluation factors including topographic position, drainage capacity, irrigation capacity, obstacle factors, profile configuration, topsoil thickness, topsoil texture, organic matter, available phosphorus and slow-release K are selected to construct the farmland fertility evaluation index system and the hierarchical model. The Analytic Hierarchy Method and Delphi Method are used to confirm the membership and the comprehensive weight of the evaluation factors. Also, the Index Method is used to calculate the farmland fertility index and its variation in the construction area before and after construction, [Result]determine the farmland fertility grade and calculate the integrated productivity capacity of project area was increased by 1860 kg/ (hm2?a), [Conclusion]to provid feasible suggestion on constructing high-standard basic farmland and lifting the farmland fertility.