Using undisturbed soil scour method and the fast wetting method (FW) of Le Bissonnais (LB), the coefficient of soil erosion, soil structure and the relationship between them were studied at mixed forest, broad-leaved forest, bamboo forest, shrub and bare land in Jin-yun Mountain in order to identify the best soil structure indicators under different forests. The results showed that: 1) the order of different forest soil erosion coefficient (L·min/g) was: broadleaf forest (2.719) > mixed forest (2.431) > shrub (2.024) > bare land (1.595) > bamboo forest (1.096). The stand soil erosion coefficient had a decreasing trend from the surface to the bottom except bamboo and bare land. 2) For four indicators of soil structure, the cumulative amount of >0.2mm aggregates, the average mass diameter (MWD), geometric mean diameter (GMD) and soil fractal dimension (D) in the surface layer (A layer) soil showed: the mixed forest > broad-leaved forest > shrub > bare poor > bamboo; 3) the coefficient of soil erosion and the four soil structure indicators were conducted stepwise regression analysis. Finally, the average mass diameter (MWD) was introduced into the model. In the case with a significance level of P＜0.05, it was thought that soil erosion coefficient and MWD had linear relationship, and the linear regression equation was: y = -0.306+1.823x（(R2 = 0.406，n = 19，P = 0.003）). In the study areas, the average mass diameter (MWD) can be the best soil structure indicator as expression of soil erosion resistance.