Abstract: The proton transfer reaction time-of-flight mass spectrometry（ptr-tof-ms） navigation monitoring technology was used to carry out navigation and station monitoring in the urban area and surrounding areas of a typical industrial city from June to July 2021. The monitoring data were used to analyze the composition characteristics, pollution distribution and ozone conversion activity of VOCs in the city. Among the sources of VOCs, solvent usage accounted for 61.01%, natural sources accounted for 23.3%, and motor vehicle exhaust sources accounted for 15.69%. The top 10 substances with ozone generation potential of VOCs accounted for 82.47%, and the concentration was 500.35μg/m³, of which OVOCs accounted for 42.93%, benzene series accounted for 8.49%, and hydrocarbons accounted for 31.05%. VOCs in the central urban area were greatly affected by the pollution sources used by cluster enterprises in the surrounding areas, and vinyl acetate, xylene and cyclohexanone in the solvent should be the control focus of ozone and VOCs Pollution Prevention and control in the city.