Abstract: Oil spill accidents from vessels in inland waterways occur frequently, severely endangering the health of nearby water bodies. Riverbanks often consist of vegetated boundaries, and riparian vegetation zones have a strong adsorption capacity for spilled oil. After establishing a two-dimensional hydrodynamic model, an oil spill spreading and drifting model and an oil spill adsorption model, and verifying their validity, this study takes the Wushan reach of the Three Gorges Reservoir area as a typical case to investigate effects of flow velocity, plant type, and wind speed on oil adsorption by riparian vegetation zones. The results showed that higher river flow velocities lead to faster oil adsorption rates by riparian vegetation zones, making it easier for the vegetation to reach saturation. Different plant types exhibit varying adsorption capacities, with eucalyptus demonstrating the strongest adsorption ability and requiring the longest time to reach saturation. Additionally, stronger onshore winds accelerate the arrival of spilled oil to the riparian vegetation zone and its subsequent adsorption. The findings of this study can provide references for understanding oil adsorption by riparian vegetation and for developing prevention and control strategies.