The authors use the high-frequency sampling function of the fine particle mass concentration measurement instrument E-Sampler and the eddy covariance method to calculate PM_{2.5} concentration fluctuation and turbulent flux of the multiple pollution events of the Dezhou city atmospheric environment experimental station in Shandong Province from December 27, 2018 to January 7, 2019, and the turbulence characteristics of PM_{2.5} concentration are discussed. The results show that the mean value of the turbulent flux of PM_{2.5 }concentration during the observation period is 0.026 μg/(m^{2}·s). The transmission direction of the turbulent flux of PM_{2.5} concentration in different pollution processes is different, indicating that the sink or source property is not static. With the increase of turbulence statistical characteristic quantities (such as turbulent kinetic energy, standard deviation of horizontal wind speed, standard deviation of vertical wind speed, horizontal wind speed, momentum flux and sensible heat flux), the vertical flux of PM_{2.5} decreases exponentially, namely, it decreases sharply, and then changes little with the increase of each variable. With the increase of the concentration of PM_{2.5}, the absolute value of the turbulent flux of PM2.5 shows an increasing trend. The turbulent vertical flux of PM_{2.5} concentration is related to the PM_{2.5} concentration and the intensity of turbulence. The normalized standard deviation of PM_{2.5 }concentration and the stability parameter *ζ* = *z/L* follow the -1/3 power relationship under unstable conditions, that is *σ*_{c}/*C*_{*} = 6.7(-*ζ*)^{-1/3}. Under stable conditions, the experimental results are relatively discrete. In addition, the variance spectrum curve of PM_{2.5} concentration satisfies the -2/3 power exponential rate in the high frequency range, and the covariance spectrum curve of the PM_{2.5} concentration and the vertical wind speed satisfies the ?4/3 power exponential rate in the high frequency band. The result shows that 1 Hz high-frequency sampling function of E-Sampler can obtain continuous and effective turbulent flux of PM_{2.5} concentration.

%U https://xbna.pku.edu.cn/EN/10.13209/j.0479-8023.2021.082