By means of Fuzzy methods, the western Shanxi Province can be divided into five gravitation erosion areas as follows:1. the northwestern breakdown area;the intensity in the area of gravitation erosion (for short I)is about 3,200t/km²·y,and accounting for about 2/3 of the total amount of soil erosion(for short m);2.the western slumping, breakdown area, the intensity is about 2,860-4,130 t/km²·y,and m is 45 to 65 percent;3.the central denudation, slumping and break- down area,intensity is about 4,460 t/km²·Y,and m is 16.9 to 34.7 percent; 4.the southern slumping, denudation area, the intensity is about 4,400 t/km²·y, and m is 51 percent; 5.the eastern weak gravitation erosion area, the intensity is less than 500 t/km²·y. Summarily, the amount of gravitation erosion makes up 35 to 46 percent of the total amount of soil erosion in western Shanxi Province.