生态农业建设是促进农业和农村经济持续健康发展，农业资源高效利用，农民生活质量明显提高的必由之路。我国在政府的积极倡导下，经过近三十年的理论与实践，生态农业得到迅猛的发展，但是对以县域为单位的生态农业建设成效研究较少，通过对县域生态农业建设成效的研究，提出下一阶段发展策略，对促进我国生态农业建设起到一定的指导作用。 自2004年，江苏省在全国生态农业试点县、生态农业示范县建设基础上率先全面开展了省级生态农业县创建活动。本文实证分析了江苏省生态农业县的建设历程及现状，并结合江苏省生态农业建设现状，对在生态农业建设中形成的典型生态农业模式进行了系统分析，结果显示生态农业模式的推广促进了江苏省生态农业县建设，改善了经济、生态、社会三大效益，在下一阶段江苏省生态农业建设中，生态农业模式的推广与应用将具有重要作用。 在江苏省生态农业县建设现状分析的基础上，从经济、生态、社会角度筛选出23个指标建立了生态农业县建设成效综合评价指标体系，并且设计了好、较好、一般、差4级评级标准；选取了2003~2006年间通过验收的22个省级生态农业县作为研究对象，采用模糊综合评价法对分别对2003~2005年第一批通过验收的省级生态农业县的建设成效以及2004~2006年第二批通过验收的生态农业县建设成效进行了综合评价。评价结果显示江苏省生态农业县建设成效显著，22个县生态农业建设水平均有所提高，其中生态建设成效最为显著，大部分县通过2年生态农业县建设提高了2个等级，经济建设成效其次，社会建设成效比较稳定，在2年的生态农业县建设中保持在较好的等级，变化不大。 本文在对生态农业县建设成效综合评价研究的基础上，运用障碍因素诊断，找出22个生态农业县建设的主要限制因子，并归纳分析苏南、苏中、苏北三大区域生态农业县建设的主要限制因子，针对限制因素，分别提出苏南、苏中、苏北三大区域的生态农业县建设的发展对策，并在此基础上从全省角度提出推进生态农业县建设的发展对策，从而为江苏省生态农业县下一阶段建设提供发展思路。

The Eco-agriculture is the only way that to improve the development of agriculture and rural economics continually and the standard of farmer’s life, and makes full use of the agriculture resource. Due to the prompting by the Chinese government, remarkable development has taken place in both theory and practice of Eco-agriculture in the past 30 years. However, the research on the development of the Eco-agriculture construction effectiveness in the units of county region was extraordinary rare. Hereby, the research on the Eco-agriculture construction effectiveness is on the way to put forward the next development strategy, which play a guiding role in China’s Eco-agriculture construction. Since the year 2004, the leading developments of the provincial-level Eco-agriculture country construction in Jiangsu province, which based on the construction of national Eco-agriculture demonstration county and Eco-agriculture country have come forth. Based on the system analysis on typical Eco-agriculture model which combined with Eco-agriculture construction situation of Jiangsu province, the research paper empirical analyses on the Eco-agriculture country construction process and present situation. The results turn up that the extension of Eco-agricultural model has improved not only the agriculture construction of Jiangsu province, but also the economy ecological and the society benefit. The application and extension of Eco-agricultural model will play an important role in the next stage Eco-agriculture construction of Jiangsu province. Also based on the analysis on Jiangsu Eco-agriculture country construction, the paper selected 23 comprehensive evaluation index of Eco-agriculture construction efficiency which based on economic, ecological, social perspective.For one thing, the paper designs four level evaluation standards which are best better common and bad. For another, the paper selects the 22 provincial-level Eco-agriculture counties as the object which have been checked and accepted from 2003 to 2006, and comprehensive evaluation of the first batch Eco-agriculture counties which constructed Eco-agriculture from 2003 to 2005 and the second batch Eco-agriculture counties which constructed Eco-agriculture from 2004 to 2006 by using the fuzzy comprehensive evaluation method. The evaluation turns up that the province-level Eco-agriculture construction with remarkable efficiency. Between the two years, the 22 Eco-agriculture countries construction effectiveness have been increased, the most notable effectiveness is ecological benefit, most of the countries has leveled up by two levels, the better effectiveness is economic benefit, the social benefit is more stable which always keep on better level. In short, on one hand, the paper analyses the main restricted factors of the 22 provincial-level Eco-agriculture by the obstacle factors research, based on the basis of the Eco-agriculture construction effectiveness. On another, the paper concludes the main restricted factors of Southern Central and Northern three large regions of Jiangsu province, and puts forward the development strategy respectively. Finally, on the point of view of the whole province, development strategy is put forward to promote the Eco-agriculture country construction, so as to offer development ideas for Jiangsu province.