The laws governing the secular variation of droughts and studies for their trend are closely related to our national economy, especially to the agricultural production. Analyses are made of the time and space distribution, stages and periodicity of droughts in both the southern and northern parts of Jiangsu Province during the past 200 years By use of the two main cycles calculated and referring to the 11-year quasiperiodic law for the relative number of sunspots, the authors present the trend of the occurrence of droughts in the coming 20 years.