Abstract: Taking Linze county as a study area,using GIS technology,based on the administrative division, the natural and geographical conditions,this paper plots out the evaluation unit of land in Linze county,filtrates the evaluating index by applying Delphi method,establishes the evaluation index system and determines the weight value. Then we calculate comprehensive assessment value with SAW method and set up the grade standard of suitability about land ecosystem. On the basis of the grade standard determination,we divide the sub-areas of adaptability of land ecosystem in Linze county,identify the usage of each sub-area,finally sets up the proper mode to adapt to eco-development. This provides scientific basis for development of ecological security barrier in the county.

Key words: land ecosystem suitability, evaluation unit demarcation, evaluation index, GIS