[Objective] The paper was to explore the adsorption behavior of pymethrozine in soils.[Method] The adsorption behavior of pesticide pymethrozine in five different types of soil was studied using bath equilibrium method,and the effect of soil physical and chemical properties on adsorption of pymethrozine in soils was also explored.[Result] The amount of pymethrozine adsorbed by soils was different in the soils with different properties.Soil pH was the main physical and chemical properties affecting adsorption of the pesticide in soil.The adsorption ability of pymethrozine in five different types of soil successively was Henan cinnamonHunan red loamYunnan clay loamShangdong cinnamonHunan alluvial soil.Freundlich equation could better fit the adsorption isotherm of pymetrozine in soil.The adsorption constant（Kf） of pymethrozine in five tested soils was varied between 6.220 1 and 69.376 0,free energy was 14.70-21.12 kJ/mol,which was manifested as physical adsorption process.[Conclusion] The study provided reference for evaluation on the damage potential of pymetrozine on soil and groundwater.
