From late June to early July in 2017, the regional flood was led by the continuously intensive precipitation thatoccurred in the middle stream of the Yangtze River basin. Based on the real time flood data, this paper analyzed thecharacteristics of the "2017·07" flood in the Yangtze River. According to the judgment of flood peak water level , heavy rainfallhad caused catastrophic flood that exceeded measured maximum record in the Xiangjiang River of the Dongting Lake watershed;Zishui River and Yuanjiang River reached the water level at which the security of the rivers could not be guaranteed, so was theDongting Lake. For rivers that belong to the Poyang Lake watershed, water level in the upper stream of the Anle River exceededmeasured maximum record while the Changjiang River, Xiushui River and the middle and lower streams of the Anle River occurreda flood with a 10-year return period. The water level of the Poyang Lake exceeded the warning stage. For the mainstream of theYangtze River, water level in the stream below Lianhuatang water section exceeded the warning stage. However, some vitalreservoirs distributed along the upper and middle streams of the Yangtze River played effective roles in lowering the water level ofriver reach between Lianhuatang and Luoshan, and duration of water level exceeding the warning stage was shortened by 6 days atthe Chenglingji station in the Dongting Lake.