Abstract: The triticale varieties Dongnong 8809 and Dongnong 95-6654 were chosen as experimental materials to study the effect of application of exogenous GA3 on brewing quality. The results indicated that exogenous GA3 can affect the manufacturing and brewing quality. The 10mg/L and 20mg/L GA3 may improve the 1000-grain weight, which is higher than 30mg/L treatment and CK significantly. Triticale grain of α-amylase activity for starch hydrolysis was improved, which can accelerate the ability of the decomposition from starch to fermentable sugars. The paper showed that spraying exogenous GA3 can improve triticale brewing quality. The 20mg/L GA3 is benefit for the highest malt quality.