Taking the typical research region of Yangou，a small watershed in an eroded red soil area of south China，as an example，an evaluation of land resources based on GIS and GPS technologies，employing fuzzy mathematics and index methods，has been undertaken.The evaluation assigns 55.1% of the land area in the watershed to five grades，with general land quantity being low in the area.Soil erosion is the main resource limiting factor，and adoption of engineering measures，planting measures and combinations there are of importance to the reasonable utilization of land resources and to the enhancement of soil fertility in the region.Application of GIS、GPS and fuzzy mathematics methods is scientifically sound and feasible for the evaluation of the land resources at the scale of small watersheds.This research expands the field for this type of land resources evaluation.