The main ingredients are maltose and a certain proportion of maltotriose, oligosaccharides, and glucose. Beer syrup is made of corn starch as raw material, and adopts a special enzymatic process by liquefaction, saccharification, refining and concentration. In the beer production instead of auxiliary materials or part of the malt, the beer made has rich foam, strong foam, pure aroma, fresh taste, no odor, clean taste, with the typical color of light beer.