Ozonation technology has the advantages of high efficiency and no secondary pollution, which has been widely used in a wide array of wastewater treatment. However, the low efficiency of ozone mass transfer in the gas-liquid interface increases the operating cost. Based on the analysis of the ozone mass transfer theory, the research status and strengthening mechanism of ozone mass transfer are reviewed from the aspects of improving the structure of gas-liquid contactor, adding the promoter and applying the physical field in this paper. The topics of future development of ozone mass transfer enhancement are also suggested.