On the basis of deficiency of study on regional drought and severi ty of droughts in Chongqing , this article analyses the cause of formation of droughts , characteristic and distribution in Chongqing , and puts forward to system of targets assessment main parameter and calculation technology for drought economic losses of Chongqing directing against the blank of quantitative research of economic losses of the droughts in Chongqing, moreover combining with qualitative methods and quantitative me...