The sweet corn juice was prepared by using double enzymes method, i.e. catalyzed by medium temperature α-amylase and saccharifying enzyme. The soluble solid matter content was analyzed as the basis of evaluation. The liquefaction process was investigated in solid-liquid ratio, medium temperature α-amylase dosage, enzymatic hydrolysis temperature and time on the amylolysis effect, and then the effects of the amount of saccharifying enzyme, saccharification temperature and time on the enzyme solution were also studied. On the basis of single factor experiments, the optimum technological conditions of double enzyme hydrolysis for sweet corn were optimized by orthogonal experiment. The results showed that the sweet corn pulp could be produced best, using the solid-liquid ratio of 14 (g/mL) and liquefied at 55 ℃for 25 min with 0.35% of medium temperature α-amylase, then saccharified for 20 min with 0.15% of saccharifying enzyme. The soluble solid matter content of the sweet corn juice prepared under the best condition was 3.90%. This method showed the advantages of simple operation, consuming short time, and effective juice extraction, etc., and it could be popularized and applied in the processing of sweet corn beverage.