Abstract: The preparation of cyclohexanone is one important organic chemistry teaching experiment. In this paper, we modified the experimental operation to prepare cyclohexanone using K₂Cr₂O₇ instead of Na₂Cr₂O₇·2H₂O as oxidizing agent. The solids of K₂Cr₂O₇ were directly added to the round flask with the mixture of cyclohexanol and diluted sulfuric acid in one/two/three portions, the reaction temperature is controlled between 55~60 ℃ through heating or cooling, the reaction time is controlled in the range of 20~30 min, cyclohexanone can be obtained in good yields. The distillate from the simplified steam distillation can be extracted directedly using methyl tertiary-butyl ether (MTBE). The combined organic phase is easier to dry and easily separated from the drying agent. The modified experiment procedure has a good reproducibility and stable yield and can be promoted in other universities.