Abstract: An experiment on waste water treatment of diary industry was conducted using a technique of mixed PSB pellicle fixed by charcoal filler. Its technological processes, technical parameters and effect were described. The results showed that various indexes of the effluent were all reached the discharge quality standard. The rejections of COD Cr , BOD 5, SS, S 2- and Oils were 97%, 98%, 96%, 86% and 88% respectively.