34 representative stations with consistent precipitation variability over Changjiang-Huaihe River Valley were selected and cold period of 1960-1977,transitional period of 1978-1996 and warm period of 1997-2011 were divided to analyze the response of Meiyu characteristics to climatic warming by methods of statistic and synthesis analyses. Results show that the Meiyu onset,Meiyu ending date, Meiyu length period,Meiyu rainfall amount are characterized by late-early-late,early-late-a little late, short-long-short,and little-much-little variation trends,respectively. Meiyu intensity and pecentage of rain days during Meiyu period are declining. Percentages of Meiyu torrential rain days in Meiyu rain days,no rain days in Meiyu length and the maximum continuous no rain days in the Meiyu length show rising trends. The relationship between variations of atmospheric circulation at 500 hPa in response to climatic warming and variations of onset date,ending date,Meiyu length as well as Meiyu rainfall amount was also studied.