Abstract: This study investigated the adsorption-desorption characteristics of tembotrione in four different types of soils using the oscillating equilibrium method, explored the primary factors influencing its adsorption properties, and assessed the impact of biochar addition on its adsorptive behavior. The experimental results indicated the following: Adsorption kinetic tests revealed that the adsorption equilibrium time for tembotrione in various soils was 24 hours. The adsorption thermodynamic tests showed that the Freundlich model could effectively fit the adsorption curves of tembotrione in all four soil types. The adsorption intensity of tembotrione in these soils followed the order: red soil > paddy soil > black soil > fluvo-aquic soil. Desorption tests demonstrated that the hysteresis coefficients (H) of tembotrione in different soils were all less than 1. The lower the soil pH value, the stronger the adsorption of tembotrione in the soil. Additionally, there was a positive correlation between the content of organic matter and cation in the soil and the adsorptive properties of tembotrione. The adsorption capacity of tembotrione in the four different soil types ranged from 2.1 to 20.2 mg/kg. After the addition of rice husk biochar at varying ratios, the adsorption capacity increased to 8.3-21.0 mg/kg. This research provides a scientific basis for the rational and scientific use of tembotrione.