Abstract: As a common type of engineering restoration after earthquake, the post-earthquake slope has a great disturbance on the soil structure and vegetation of the slope. In this paper, the soil on the slope after earthquake vegetation restoration in Jiuzhaigou project was taken as the research object, and four sampled plots with soil-stone bag steps, straw mulching, replanting trees and herbs were selected. The hydrological effects and soil aggregate characteristics were analyzed by geostatistics, combined with grid sampling and indoor analysis. The results showed that: (1) The soil particle size of the four sampled plots was mainly 0.001−0.05 mm, and there were differences among different soil layers in different restoration models, mainly in 0.001−0.25 mm and 0.01−0.05 mm. (2) The average value of soil bulk density, capillary porosity and total porosity in sample plot 1 were the highest, and the average value of soil water holding capacity, soil water storage and reasonable irrigation quota in sample plot 1 were the highest. The differences of maximum water holding capacity, capillary water holding capacity and minimum water holding capacity between the surface layer of 0−10 cm and the subsurface layer of 10−20 cm in sample plot 3 were the highest. (3) In the four sampled plots, the content of 2−5 mm aggregates was the highest, reaching 38.95%−54.68%; the content of >5 mm aggregates was the lowest, ranging from 2.07% to 5.52%. The proportion of 2−5 mm soil water-stable aggregates was the highest in sample plot 3, and that of <0.25 mm soil water-stable aggregates in sample plot 1, 2 and 4 was the highest. The order of soil aggregate content >0.25 mm was that the content of soil aggregates in the lower layer was higher than that in the upper layer, and the order of sample plots were S3>S2>S1>S4. (4) Under dry sieving treatment, the order of MWD value of 4 plots was S1>S3>S4>S2, but the order of GMD value was S1>S3>S2>S4. The MWD values measured by dry sieving method were higher than those by wet sieving method. The variation order of fractal dimension D of air-dried aggregates was S4>S2>S3>S1, but that of water-stable aggregates was S4>S1>S2>S3. Above all, the soil difference of the slope after the earthquake had a significant effect on hydrological effect, mainly focusing on pore characteristics. After the massive loss of clay soil on the surface of the slope after the earthquake, the surface soil became sandy and gravel and the stability of soil aggregates decreased. The results can provide theoretical basis for restoring soil structure and reducing soil erosion under the background of different engineering measures for slope restoration after earthquake.