Abstract: The removing effect of summer rainfall and wind on inhalable particle matters was investigated in this study.The number concentration of inhalable particle matter were measured continuously by an electrical low pressure impactor (ELPI) with a temporal resolution of 30 s in the southern suburban area of Xi'an from May to July of 2014.The simultaneous meteorological observations of precipitation,wind direction,and wind speed from a mobile automatic meteorological station were collected.These data were used to conduct this investigation.The results show that persistent moderate rainfall can remove all inhalable particle matters.The short-time persistent moderate rainfall causes an increasing number concentration of coarse particles.Persistent light rainfall has limited effects on the removing of particles in the nucleation mode and those of smaller sizes in the Aitken mode.The discontinuous light rainfall does not remove inhalable particle matters.The easterly winds prevail in summer over the southern suburban area of Xi'an.However,inhalation particle matters are mainly transported by the westerly flows.The occurrence frequency of wind speed smaller than 3.0 m·s^-1 is relatively high,which isn't favorable for the pollutant diffusion.When wind speed is smaller than 5.4 m·s^-1,the number concentration of particles in the nucleation mode increases with the increasing wind speed.However,that of particles in other modes decreases with the increasing wind speed.It has better removal effect on particle matters in different modes when wind speed is between 5.5 m·s^-1and 7.9 m·s^-1.