Abstract:In the raw material brewing，the factors affecting the yield of liquor of materials not only Jiu-Qu，but also the nature of the starch.There are different properties from different materials.To raw materials commonly used raw materials that corn and rice for raw material brewing compared to its brewing characteristics，the results show that yield of rice was 41.8%higher than that of corn 32.1%.In order to further clarify the reason of that raw rice is higher than raw corn in yield of liquor，we analyzed the microstructures of starch before and after hydrolysis of the two material.The results show that starch granules of two raw materials have larger morphology before hydrolysis，and the rice starch granules were smaller than those of corn starch after enzymatic hydrolysis，descripting the rice raw material is more easily degraded and utilized than corn.The fermentation broth of starch and reducing sugar content changes are determined for raw meal fermentation of two raw materials.The results show that the starch content of both fermentation broth decreased significantly，while the reducing sugar content in the fermentation broth of corn 0.99 mg/mL was significantly higher than 0.41 mg/mL of rice.It was confirmed that reducing sugar converted from corn starch is harder to be utilized by microorganisms than reducing sugar converted from rice starch.