This paper aims at the problem of high concentration ozone events in summer in Airport New City (ANC) of Xi-Xian new area, Shaanxi province. In this study, online instruments were used to continuously observe the hourly concentration of ozone and its precursor nitrogen oxides (NOx) and volatile organic compounds (VOCs) in ANC from 27 July to 26 August 2018(31 days). According to the results, the ozone concentration is generally higher during the midsummer (July & August) at ANC, the average concentration was 103.8μg·m-3 and the maximum concentration reached 306μg·m-3. there were 16 days when the ozone concentration exceeded the limit during the study period. and its diurnal variation of concentration showed a single peak trend, with the maximum value about 17pm and the minimum value around 6am. The correlation coefficients of ozone and NOx、VOCs is -0.6487 and -0.0911 respectively. When VOCs/NOx was less than 6.43, VOCs plays a leading role in the generation of ozone, while when VOCs/NOx was above 6.43, NOx plays a decisive role in the generation of ozone.