Based on RS and GIS, overlayed the soil type data with terrain slope data,soil erosion data,rainfall data and temperature data to evaluate the land suitableness. The trait of land resource had been used to diagnose the farm land ,forest land and herd land,and to balance the degree of suitableness and unsuitableness. Then the land-use categories can be classified, which offer the accordance for land-use plan and identifying the spatial distribution of the reducing cultivated land to forest and grass.