The connection between the profit and loss of soil moisture and drought intensity is concerned.First,on the basis of the temperature and rain data of ChongQing in recent 36 years,the monthly and annual profit and loss of soil moisture is calculated with C·W·Thornthwait experience expressions.Then,according to the drought standard in climate,all kinds of laws of drought taking place in a general year are analysed,and the connection between the profit and loss of soil moisture and drought intensity is studied.Finally,the general laws of all kinds of drought distributions in ChongQing city are concluded.