我国是大豆、花生和油菜籽的生产大国，也是这三种主要油料作物的贸易大国。自从上世纪90年代以来，我国这三种油料作物的生产面临着难得的发展机遇。但同时，遭到了来自国际市场上强大的竞争压力。三种油料作物的国际竞争力都发生了变化。 过去，我国主要油料作物依靠低廉的成本优势，在国际市场上占据着一席之地。但近年来随着我国油料作物成本的增加，油料作物的价格竞争优势一点点被削弱。而且随着收入增加，农产品价格在竞争中的重要地位正在且将继续下降，以农产品质量为主的非价格竞争日益成为农产品市竞争的焦点。但是由于我国农业整体粗放式管理，造成了我国农产品大都质量不高，油料作物也未能幸免。因此，近年来，影响我国油料作物国际竞争力发生变化的因素不仅包括价格因素，也包括以质量为主的非价格因素。 本文在搜集大量相关资料数据的基础上，对三种油料作物的国际竞争力的变化进行测定，分析，并试图找出影响三种油料作物国际竞争力变化的主导因素。 本文共分六章 绪论部分为第一章。阐述研究的目的及意义的同时，提出研究假说并构建了研究的技术路线。 第二章介绍了与研究内容有关的理论并对国内外相关研究现状进行了梳理。 第三章对我国油料作物的生产发展和进出口贸易进行分析 第四章和第五章是本文的实证研究部分。在第四章的开始构建了一个评价油料作物国际竞争力的指标体系，并分别从指示性指标和分析性指标两个方面对三种油料作物国际竞争力进行了实证研究。 第五章对影响我国油料作物国际竞争力变化的价格因素和非价格因素进行实证研究，试图找出到底哪个因素是影响三种油料作物国际竞争力变化的主导因素；对于大豆，花生，油菜籽三种主要油料作物，主导因素是一致还是不同，在这一章，综合运用了静态和动态两种分析方法。 论文最后一章对上述实证研究的结论进行了总结，并在此基础上提出了一些针对性政策建议。

China is a big country for the production and international trade of oil crops. Since 1990s, soybean, peanut and rape, the three main oil crops, have a great opportunity for development. However, they are also facing heavy pressures from international market. In the past, our oil crops won a market share with their cost advantage in the international market. In recent years, the price advantage is weakened little by little with the increase of cost. Besides, the quality of the oil crops is low for the extensive management. Based on the collection of abundant data and materials, the dissertation measures and analyzes the change of the competitiveness of the three oil crops, and tries to find out the dominating factor influencing the change of the competitiveness The dissertation consists of six chapters. The first chapter is the preface, in which the research question is brought forward, the aim and meaning of the research are introduced, and the framework of the dissertation is built. Theories of economics and management firmly related to the issue of Competitiveness are reviewed in the second chapter , and a detailed review and summary to the current empirical studies of competitiveness of agricultural products are given in this part. The key part of the dissertation is the fourth and fifth chapters. At the beginning of the fourth chapter , an index system is built to judge the competitiveness of the three oil crops. And according to the index system, the competitiveness of the three oil crops is measured and analyzed. The core of agricultural products competition is the Customer Value embodied in the certain agricultural products. Based on the definition function of Customer Value, the competitiveness of oil crops is divided into two relatively independent aspects: price competitiveness and non-price competitiveness. In the fifth chapter, the dynamic and static methods are presented to judge the dominating competitive factors In the sixth chapter, important conclusions are drawn and some policy advice is given accordingly.