中文摘要：

对延安地区11个农业县退耕前后耕地／播种总面积、种植业结构、农业投入、粮食、油料产量与单产量以及农民年均纯收入的变化进行了研究，探讨了退耕还林对延安地区农业经济的影响及其作用机制。退耕还林优化了农村的种植业结构与产业结构，全面带动了农村经济的发展。但仍然存在着一些亟待解决的问题，并给农村经济带来了一定的负面影响。

英文摘要：

Returning land from farming to forestry is an important forestry and ecological project, which has great influence not only on ecological environment, but also on agricultural economy. In this paper, five issues of 11 agricultural counties in Yan＇ an area are studied, which include the total area change of farmland and seeding; the change of planting structure; the change of agricultural investment; the total and average output changes of grain and oil plants; the change of per farmer income per year. The influence of returning land from farming to forestry on agricultural economy and the influencing mechanism were further discussed, Returning land from farming to forestry has optimized the planting structure and economic structure. There are some issues in returning land from farming to forestry, which bring about a series of adverse impact on agricultural economy, We should pay attention to these issues in the later work.