加强耕地保护是实现粮食安全的重要保障。笔者以四川为例，通过对四川省耕地的数量、质量和环境状况及其形成原因和变化趋势的分析，对四川这样一个人多地少的农业大省来说，要实现区域粮食安全，必须要切实保护耕地资源，建设稳产高产基本农田；加大科技投入力度，大力推广土壤肥料新技术；制定相关政策措施，进一步落实好耕地保护和培肥工作；加强农业保护，提高农业比较效益和农民种粮积极性。

The protection of cultivated land is the substance base for food product and is the guarantee for food security. Based on the analysis of the quantity and quality of cultivated land and its environment, formation and the trend of change in Sichuan province, the recent situation of Sichuan is that deficiency in cultivated land resources per capita, finite in reserved resources and disproportion in regional distribution and inevitable decreasing in cultivated land. So for the sake of regional food security, the following available approaches should be adopted: 1) erecting the consciousness of cultivated land protection, strictly administering the system of basic farmland protection and guaranteeing the high quantity and quality basic farmland; 2) the agricultural science and technologies have to be further greatly developed, especially the new technologies in soil fertilizer; 3) enacting relative polices and carrying out the measurements of farmland protection and soil’s manuring; 4) strengthening agricultural protection, enhancing the agricultural contrast benefits and farmers’ enthusiasm in planting.