With the support of GIS technology to obtain the land use and soil erosion data in south Langtian Township at Karst mountain areas of North Guangdong Province in 2010 through the image interpretation , it was conducted the study on the coupled relation between the land use and soil erosion in the areas .The research results show that the dif-ferent ways of land use have different effects on soil erosion development .There is a coupled relationship between the land use and soil erosion , and the improper land use is the important reason to cause the soil erosion .Optimizing land use structure and choosing the reasonable ways of land use have the important meaning to the efficient use of land re -sources, soil and water loss control and realization of the sustainable development of regional economy .%在GIS技术的支持下，通过对遥感影像解译，获取了2010年粤北岩溶区廊田镇南部的土地利用与土壤侵蚀数据，对研究区域的土地利用与土壤侵蚀的耦合关系进行了研究。研究结果表明：不同的土地利用方式对土壤侵蚀的发育有着不同的影响，土地利用与土壤侵蚀存在耦合关系，而形成土壤侵蚀的一个重要原因是土地利用方式不当。优化土地利用结构，选择合理的土地利用方式，对于高效利用土地资源，控制水土流失，实现区域经济的可持续发展具有重要意义。
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