Abstract: By means of a new erosion test equipment, a systematic experimental study on the anti erosion properties of pavement base materials, including stabilized fine and coarse soils with inorganic binders, was executed.The quantity of erosed fine grained soils stabilized with inorganic binder increases with time linearly,while quantity of erosed coarse grained soils stabilized with inorganic binder increases rapidly in the early stage and slowly later;as for soils stabilized with the same type of inorganic binder,its erosion is weaker when more binder is added; the degree of compaction of samples affect its erosion greatly; the relationship between anti erosion properties of base course materials and its compressive strength is not simple;short experimental time can’t fairly reflect anti erosion properties.The anti erosion mechanism is also analyzed in this paper.