Aeration and no aeration are used in catalytic aluminum inner electrolysis prccess for dyeing wastewater,the treatment effects were compared by various of indexes such as COD,BOD,colority,PH etc.The results of experiments show that,the removing COD、colority in wastewater are remarkably efficient.The process with aeration is better than the process without aeration.The B/C values of dyeing wastewater treated by two different process all reach about 0.3,which is helpful to the following biochemistry processing.