Ability of flooding tolerance of 5 types and 10 cultivars of blueberry were studied through morphological observation and physiological and biochemistrical determination. The results showed that the ability of flooding tolerance of the 5 types blueberry is in the order of Vaccinium uligiosum L.＞high bush＞half-high bush＞ V.vitisidaea ＞low bush.But some cultivars of half-high bush and low bush blueberry showed high ability of flooding tolerance. The ability of flooding tolerance of different cultivars is in the order of Aron＞Bluecrop＞Koralle＞Northcountry＞St.cloud＞7917＞Blomidon=Brunswick＞Chignecto＞Northsky. The cultivars of Aron and Bluecrop and Koralle and Northcountry and St.cloud showed higher ability of flooding tolerance than others. And the cultivars of the higest ability of flooding tolerance is Aron.