Abstract: As a unique urban wetland in China, the Xixi Wetland is characterized by lush vegetation, an intricate water system, and holding significant ecological and cultural value. Monitoring data revealed that the hourly ozone (O₃) concentration in the Xixi Wetland exceeded standards on more than 40 days in 2023, highlighting the urgent need for precise pollution source tracing. Considering the low-frequency human activities and rich plant diversity within the wetland, biogenic volatile organic compounds (BVOCs) from plants may be a key factor contributing to the high ozone levels. Therefore, this study collected hourly meteorological data (temperature, atmospheric pressure, humidity, wind speed, rainfall), air quality data (PM2.5, PM10, NO₂, SO₂, CO, O₃), as well as important environmental factors (soil moisture and temperature, merchant grease emissions, and traffic volume) from November 2023 to November 2024. A quantitative analysis of the characteristics of O₃ concentration changes and their influencing factors was conducted using trend analysis, random forest modeling, and non-negative matrix factorization (NMF). The research results showed that: ozone concentrations in the wetland exhibited significant daily and seasonal variation, with higher levels during the day and in summer. The feature importance ranking from the random forest model indicated that the soil-atmosphere humidity difference and NO₂ had the most significant impacts on O₃, accounting for 44.6% and 19.0%, respectively. The NMF model identified three potential pollution source categories inlcuding traffic sources, residential and catering sources, and natural or regional sources with respective contribution rates of 18.7%, 24.0%, and 57.3%. Emissions from catering grease and vehicle exhaust within the Xixi Wetland were relatively limited, suggesting that the exceedance of O₃ concentration was more likely due to the substantial release of BVOCs from plants in summer. Therefore, it is recommended that future management of ozone exceedance in the Xixi Wetland focuses on controlling emissions of BVOCs, NO₂, and total non-methane hydrocarbons from regional sources, optimizing plant configurations in the wetland, encouraging green transportation, and enhancing supervision and guidance.