A new kind of phenyl-functionalized magnetic fibrous mesoporous silica(Fe3O4@SiO2@KCC-1-phenyl)was prepared by copolymerization as an efficient adsorbent for the mag-netic extraction of phthalate esters from environmental water samples.The obtained Fe3O4@SiO2@KCC-l-phenyl showed monodisperse fibrous spherical morphology,fairly strong magnetic response(29 emu/g),and an abundant 7r-electron system,which allowed rapid isolation of the Fe3O4@SiO2@KCC-l-phenyl from solutions upon applying an appro-priate magnetic field.Several variables that affect the extraction efficiency of the analytes,including the type of the elution solvent,amount of adsorbent,extraction time and reusabil-ity,were investigated and optimized.Under optimum conditions,the Fe3O4@SiO2@KCC-l-phenyl was used for the extraction of four phthalate esters from environmental water samples followed by high-performance liquid chromatographic analysis.Validation experiments in-dicated that the developed method presented good linearity(0.1-20 ng/mL),low limit of detection(7.5-29 μg/L,S/N=3).The proposed method was applied to the determination of phthalate esters in different real water samples,with relative recoveries of 93％-103.4％and relative standard deviation of 0.8％-8.3％.