The invention relates to a production method of beer wheat juice containing low-fermentation sugar. According to the production method, special malt is used, crashed special malt is discharged at 100 DEG C, through gelatinization and liquidation, starch in the malt is degraded to generate dextrin, protein and non-starch polysaccharides are degraded to generate a soluble component, and the special malt mainly provides non-fermentation extract in the wheat juice; common malt and burnt malt mainly provide necessary fermentation sugar in the wheat juice, alpha-amino nitrogen, protein, non-fermentation extract, flavor substances and precursor substances; supersaturated oxygen in the wheat juice is sized to guarantee beer yeast proliferation and control the limit fermentation degree of the wheat juice to be lower than 20%. The content of the fermentation sugar in the wheat juice is effectively controlled, only an appropriate amount of alcohol is generated in the follow-up fermentation process without residual fermentation sugar, the flavor of finished product beer is closer to that of common beer, and economy of beer production is guaranteed.