Objective: A new type of static mixer to enhance the ozone gas-liquid phase mass transfer was established in this study. Methods: The effects of different ozone gas flow rates, liquid flow rates and liquid temperature on the concentration of ozone liquid phase and the generation of hydroxyl radicals were investigated, and were compared with the microporous aeration method and the circulating jet method. Results: With the increase of the gas-liquid flow rate, the ozone water saturation concentration and the hydroxyl radical concentration both increased; as the temperature increased, the ozone water saturation concentration decreased, but the hydroxyl radical concentration increased. With the gas flow rate at 2, the liquid flow rate at 12 L/min and the liquid temperature at 10 ℃, the saturated concentration of ozone water reached 12.67 mg/L, and the concentration of hydroxyl radicals in ozone water was 85.11 μmol/L. The output of hydroxyl radicals was higher than that of microporous exposure. The air method and the circulating jet method increased by 73.4% and 20.6%, respectively. Conclusion: The new static mixer has a significant strengthening effect on the ozone-water liquid phase mass transfer and the generation of hydroxyl radicals.