Abstract: The climate characteristics of cold wave action are studied using the data of 11 stations'daily temperatures(daily mean and the lowest) in Guangdong Province during 1951-1994.Firstly,according to cold wave standard of Guangdong Province,all of the processes in every station are found,and the distribution characteristics are analyzed;Secondly, it is shown that there are 103 times cold wave processes in recent 44 years.The influence range is from 1 station to 11 stations.77.6% of them occur in Dec.,Jan. and Feb.,and the processes have interannual and interdecade variabilities;Finally,a strength index of cold wave is assessed,and the intermonth and interdecade variabilities are studied.