Taking the history typical drought years in Jian city of Jiangxi Province since the founding of New China to 2012 such as 1963,1978,1986,1998,2003,2007 as the research object,the preciptation,channel water regime and disaster are preliminarily analyzed and by the preciptation anomaly percentage and consecutive days without rain etc,the drought extent is assessed.Their laws and characteristics are stated and the drought extent is known.The results show that:the drought time of typical drought years in Jian city is generally longer,the disaster is also serious,the uneven spatial trend is that the drought of Jitai Basin is heavier and the mountain area is lighter and the drought gradually increase from the sourth to north of Jian city.