Molecularly imprinted polymers(MIPs) for malathion were synthesized by suspension polymerization,using azobisisobutyronitrile as the thermal polymerization initiator.The optimum conditions were as follows:the ratio of template molecule(malathion),functional monomer(methacrylic acid) and cross-linker(ethylene dimethacrylate):1∶8∶40,the reaction temperature:60 ℃,the amount of thermal polymerization initiator:1.0%.The maximum adsorption of MIPs was 4.62 μg/mg under the optimum conditions,while that of molecularly non-imprinted polymers was 2.21 μg/mg.The absorption amounts of MIPs for ethoprophos,phorate,terbufos,dimethoate,malathion,and fenamiphos were 3.87,3.75,3.57,4.00,4.44,3.61 μg/mg,respectively,while those of the non-imprinted polymers were 1.42,1.37,1.30,1.43,1.12,1.23 μg/mg,respectively.