By use of regular data and methods,meteorological and hydrological features of 2003,1991 and 1954 are analyzed.Results show that the precipitation in the Huaihe river basin during the summer of 2003 much more than the normal,more than 1991,but less than 1954,and therefore was the second biggest rainy year only next to 1954 since 1949;the flood in 1954 was the biggest,one in 2003 the next and one in 1991 was the smallest among the three years.Higher flood peaks,larger fluxes,longer durations and severe disastrous losses are the common features of them,while differences exist in aspects of the intensity and time of precipitation and floods with the eariest in 1991 and the later in 1954 and 2003.As far as the general circulation situation be concerned,the common features for the three years are:the southward shifted subtropical high,and frequent activities of blocking high in the Asian westerlies;the weaker cross equatorial flow/equatorial west wind,thus the weaker ITCZ(east of 120°E);and the stronger low-level jet.The different features are that the east blocking high dominated in 1954 and 1991,while the middle blocking high was active in 2003;the subtropical high in 1991 was similar with one in 2003 but with a smaller area and weaker intensity,and among the three the subtropical high in 1954 was the weakest,smallest,and southest.