Abstract: The regional distribution and the moving trajectory of the flood-causing annual maximum storm(FCAMS) in China during the 20 century are analyzed.The result shows that the whole moving trajectory is in a jumble.The FCAMS may randomly appear in any place over the country,but in the regions in the Central China and the East China the FCAMS appeared with higher frequency than other regions.The regional distribution and the moving trajectory of flood-water logging centre during the 1470-1899 period are analyzed too.The result sufficiently supports the understanding gained from the analyses of the FCAMS of the 20 century.So China has to establish Its flood prevention strategy based on the important facs mentioned above.