In the context of natural disaster data in China during 1989-2008, a composite index of meteorological disaster is estimated by the integration method. The cluster analysis is used to classify the losses during the 20 years and the change of losses is further discussed. The results show that the composite index of losses is greater in 1989-1998 than that in 1999-2008. The number of death people caused by meteorological disasters shows a significant decreasing trend during the past 20 years. As for composite index, the years with serious grade occurred in 1991,1994,1996 and 1998.