Abstract: Bazhou is situated in the southeast of XinJiang. The southerm Kunlun-Aerjin Mt and the northern TianShan Mt in it were due to influenced by the abnormal weather system of various sizes, often form floods of various levels, sometimes forms catastrophic flood which isn't adapted to arid land. Based on the theory of Hydrology, the auther expounded the flood characteristics of the distribution in region and the changes in time, and the level of flood forecast in Bazhou.