The ultraviolet sterilization time,the addition of water,the proportioning of compound deoxidizers and the weight of compound deoxidizers whose effect on the preservation of the fresh dousi during preservation are researched.After single factor and orthogonal test,the best way of preservation we get is：deoxidizer Ⅰ： deoxidizer Ⅱ is 4∶1,without water,the ultraviolet sterilization time is 10 minutes.The fresh dousi whose total number of colonies is less than 105 cfu/g and mold is less than 150...
