This study, based on ERA-5 reanalysis data, contrasts the spatiotemporal evolution characteristics of two types (10-30 days and 30-60 days) of intra-seasonal oscillations (ISO) in mid-high latitude Eurasia during boreal summer. Meanwhile, using the daily maximum 8-hour average ozone concentration published by the China National Environmental Monitoring Center to analyse the influence of HF-ISO and LF-ISO on surface ozone pollution in North China. The results indicate that the occurrence frequency of HF-ISO is higher than LF-ISO, and the intensity of HF-ISO is also stronger than LF-ISO. HF-ISO will propagate southeast from the mid-high latitude Eurasia by phase in a constant speed. While the LF-ISO tends to intensify and linger in the Siberian region for an extended period before propagating southward. Both ISOs exhibit a quasi-barotropic structure. The results of wave flux show that the southeast propagation of Rossby wave energy is conducive to the southeast propagation of temperature anomalies. As SAT anomalies spread southward to North China, they affect local weather conditions. The distribution of ozone concentration anomalies suggest that two types of ISOs can modulate precipitation, relative humidity, and total cloud cover, consequently affecting temperature anomalies to influence surface ozone concentration. Because of the slightly different geographical influences for two types of ISOs, the corresponding surface ozone pollution anomalies are different. These results indicate both ISOs can influence surface ozone concentration, which provide valuable insights for pollution control efforts for North China.