Abstract: With the in-situ soil moisture data of Hubei province in June and July 2003, this papar brings out CCFD, CCD,CFDR and temperature difference (TD) into the drought monitoring model,analyzes their relationships and to what extent they influenced the integrated drought index,so as to make certain their powers in this model. The results show that these parameters have their independence and importance,and using the correlation coefficients as powers is better than that of equal powers.