Concentration Variation characteristics of PM10 in Zhanjiang during 2001~2007 were analyzed by means of the numerical statement method and time-frequency analysis. The results show that the PM10 concentration in Zhanjiang varies obviously from day to day and fits the peak type
which indicates a right asymmetric distribution shape with great decline.The variance and annual spans appear to have decreased these years. The mean value and variance of PM10 are great in winter and spring