Abstract: Soil aggregate stability is a key factor of soil productivity and soil health. In order to provide a basis for the restoration and reconstruction of the ecological environment in the riparian zone, the distribution and stability of soil aggregates in different types of land-use, and the distributions of organic carbon and nitrogen in various aggregates, were explored. Of three typical land-use types (corn fields, paddy fields, and abandoned grasslands) in the riparian zone of the Three Gorges Reservoir, soils were classified using the wet sieving method. The distribution of aggregates and their organic carbon and nitrogen contents were clarified at soil profile depths of 0-10, 10-25 cm for each land-use type. Additionally, the organic carbon and nitrogen content of the bulk soil and different soil aggregates fractions were measured. The relationships between organic cement of the aggregates, soil physicochemical properties and soil aggregate stability were analyzed by structural equation modeling (SEM). The results showed that: (1) Soil depths have different effects on aggregate stability, organic carbon and nitrogen content in the riparian zone of the Three Gorges Reservoir; (2) In the 0-10 cm soil layer, the proportion of soil macroaggregates and the stability of aggregates were significantly enhanced following farmland abandonment; soil aggregate carbon and nitrogen of different soil aggregates fractions in abandoned grasslands were significantly higher than that of farmlands; the relative contribution rate of organic carbon and nitrogen of >0.25 mm fraction aggregates to the bulk soil organic carbon and nitrogen content significantly increased; (3) In the 10-25 cm soil layer, soil aggregate stability, aggregate-associated carbon and nitrogen have been insignificantly improved following farmland abandonment; (4) Structural equation model analysis found that soil organic carbon (path coefficient of 0.76) and total phosphorus (0.58) had a significant positive effect on soil aggregate stability, and pH (-0.42) had a significant negative effect on soil aggregate stability; total potassium (0.23) and total nitrogen (0.15) indirectly promoted the soil aggregate stability via promoting the formation of soil organic carbon; soil bulk density (-0.11) indirectly weakened the soil aggregate stability by inhibiting soil organic carbon. All of the findings from this study may serve as theoretical bases for evaluating soil structure effects and ecological restoration.