Based on the observed PM_2.5 concentration data and the wind field obtained from CCMP (Cross Calibrated Mulit-Platform) reanalysis data from 2015 to 2016, the characteristics and effects of near-surface wind field in North China, Yangtze River Delta, Pearl River Delta and Sichuan Basin under PM_2.5 pollution conditions were investigated. Results show that: (1) near-surface wind speed is negatively correlated with PM_2.5 concentration. Low wind speed contributes to the accumulation of PM_2.5, but the correlation is not completely significant, which reflects the "strong in winter and weak in summer" seasonal difference. (2) Different regions have different responses to PM_2.5 concentrations under different wind directions. In North China, PM_2.5 concentration is high when southerly wind dominates. While the PM_2.5 concentration in the Yangtze River Delta is high dominated by the westerly wind. In the Pearl River Delta, the dominant wind direction in winter is northerly. (3) By analyzing the characteristics of surface convergence and divergence field, it is found that the type of pollution in different regions are various. The pollution types in North China, Yangtze River Delta and Pearl River Delta are mainly regional pollution while the pollution in Sichuan Basin is mainly local and the external transportation has little influence on it.