In this work,nanometer CeO2 particles were prepared by microwave,the materials included cerium sulfate and sodium hydroxide,the surfactant was polyglycol.The effect factors of preparing conditions were investigated respectively.The optimum conditions of synthesis process were obtained by experiments as follows:the molar ratio of reactants was 4.8∶1,the dosage of PEG in the reaction process was 8 mL,the dosage of PEG in the washing process was 7 mL,the dosage of absolute alcohol was 10 mL,the irradiation tim...