Abstract:Soils of urban traffic greenbelt such as wooded land, shrubland, and meadow in the Neijiang city were taken as research subjects to examine the anti-erodibility of soil in the traffic greenbelt in the city by analysis of the indices like the drying sieve aggregate, the mechanical composition, water stable index(the K value)and anti-corrosion resistance index. The results show that the corrosion resistance strength the three kinds of soil differ in anti-erodibility, yet all with a declining trend over time. What's more, it is found that the soil anti-erosion indices under the three modes all take a changing trend in the curve of a cubic function with the soaking time. The correlation analysis shows that the water stable index and clay particle, physical clay, the granular sizes of >0.25mm, 2-5mm, 5-7mm are positively correlated with each other. Yet, a negative relation is found in between the water stable index and coarse silt, sand grain, the granular sizes of 0.25-0.5mm, 0.5-1mm, which indicates bigger the soil aggregates size, the less the contents of the clay particle, physical clay, and the bigger the water stable index is, a stronger soil anti-erodibility will be. The anti-erodibility in descending order is pure forest > bush fallow > meadow.