Experimental studies have shown that AEW( Acidic Electrolyzed Water) plays a strong role in killing grape virus,and it has instantaneous,broad-spectrum,efficient,safe and non-residual fungicidal properties. The results show that spraying AEW,and spraying alkaline electrolyzed water first and then AEW,can play a good role in controlling the virus damage of grape downy mildew,Botrytis cinerea,anthracnose,grape Alternaria spot,and anthrachose of grape,with foliar control effect of 93. 5%,96. 2%,93. 20%,100% and 87. 9%,respectively,and ear control effect of 88%,92%,84%,84% and 72%,respectively. AEW can replace pesticide,and can promote the average grape weight and sugar degree.