In this paper, the characteristics of the spatial and temporal variations ofdrought inHe’nan provincewere statistically analyzed based on observed data from 1970 to2007 of113 stations by using themeteorologicaldroughtcomposite index. Firstly, the historical day-to-day CIwas calculated, and on the basis of the statistics on drought events in each station and each stage in resent 40 years inHe’nan, the occurrence frequency and coverage area of drought in each station were calculated, then the annual variation of coverage area and spatial distribution of different classification ofdroughtwere analyzed. The results show thatdroughtoccurred in the highest frequency (63. 6% ) in summerand the lowest(48. 8% ) inwinner, and in spring and autumn the frequencywere 55. 4% and 56. 9%, respectively; The large area drought inwhole province occurredmostly in spring and autumn but least inwinterduring the period of1970 to 2007; In summer and autumn the large area lightdrought occurred easily in the whole province but the heavy drought occourred little; Inwinner the light andmiddle droughtoccurrence presented obvious latitude distributionwith little in south andmore
in north, which had negative correlation with precipitation distribution.