Abstract: In order to evaluate the sensitivity to alkali-saline land in the West of Jilin Province with the fragile eco-environmental problems, 6 395 cells had been divided with the help of the polygon over-laying method of GIS and 6 indexes were chosen. The degree of sensitivity had been divided into non-sensitivity, low-sensitivity, high-sensitivity and the highest-sensitivity. The AHP model was used to ascertain the weight of evaluating indexes, and the Fuzzy model was used to evaluate the level of sensitivity to alkali-saline land,which could supply the useful basis to the division of the sub areas and visualization of result by GIS technology.The result showed that the above methods could improve the precision of evaluation. The alkali-saline land in the West of Jilin Province is dominated by highsensitivity. The low-sensitivity and the nonsensitivity were take second place, and the highest-sensitivity was the least.

Key words: GIS, sensitivity to alkali-saline land, AHP, Fuzzy, visualization