The reasons of heavy rainfall occurred over Changjiang River Basin in 1999 and 1998 summers are analyzed using Black-Body Temperature (T_BB) from Japanese GMS.It is emphasized.The relationship between monsoon cloud surge interacting with subtropical high over South China Sea and heavy rainfall processes in South China and Changjiang River Basin.The results show that subtropical high moved northward and heavy rainfall occurred over South China when monsoon cloud surge onset;in contrast,subtropical high occupied South China and South China Sea and heavy rainfall presented over Changjiang River Basin as monsoon cloud surge broke.