Adsorption of Prochloraz and its major metabolites,BTS44595,BTS44596 and BTS45186,in six types of paddy soil were studied with the batch equilibrium method.Results show that the paddy soils adsorbed Prochloraz and its metabolites by physical means,and the adsorption process could be represented with the Freudlich isotherm equation.Absorbing capacity of the paddy soils was higher for Prochloraz than for its metabolites,and there was no visible distinction in adsorption amount between the three metabolites.Adsorption of Prochloraz by the paddy soils were positively correlated with organic matter content,cation exchange capacity and clay content,while adsorptions of the three metabolites were restricted by pH values of the paddy soils, suggesting that metabolism of Prochloraz could change its adsorption behavior and mechanism in the paddy soils.Therefore,adequate attention should be paid to that when Prochloraz was applied to the paddy soil.