By using conventional data,HLAFS grid point data and GMS-5 stationary satellite infrared cloud picture,the diagnosis and research on synoptic characteristics of typhoon heavy rainfall in the year of 2001 in China,a especially severe rainfall caused by tropical depression on 5th August in Shanghai and physical conditions of severe rainfall from typhoon Liulian (0103) are performed.The results suggested that the dynamics,thermodynamics,atmospheric stratifications stationary and other physical factors have played a major role in the processess of two severe rainfall events investigated.As a result,it will profit us to do real time operational forecast and research work as well.