Based on the frost data collected by Hunan 95 observation stations from 1971 through 2002

the dates that the frosts began and ended are analyzed statistically. The total days

locations and durations that frost appeared monthly in the past years in Hunan are studied

respectively.The statistical frequency

time and geographical distribution of frost in Hunan in the recent 30 more years are presented. In addition

the annual maximum frost day and its distribution in the past years are analyzed systematically. The work of this paper is beneficial for protecting Hunan electric power network from frost damage.