Potato starch waste was one of the main products in the potato starch industry.The starch waste contained a lot of organic matters.It would contaminate environment and resources.Researches had done on potato starch waste treatment by Aureobasidium pullulan without hydrolysis.The results showed that the COD concentration of starch waste didn't influence the Aureobasidium pullulans growth,and the concentration of organic matter could reduce with the time delay,but the amount of pullulan polysaccharide would rise up with the waste concentration increases,and COD removal amount would increases with the waste concentration rise.The treatment of potato starch waste by biological methods of Aureobasidium pullulans would be helpful to the environmental protection and economic benefit.