Chinese name: β-glucanase β-glucanase enzymatic hydrolysis of a variety of enzymes in general. Different mode of action can be divided into endo-and exo-type. The former is present in cereal seeds, some fungi and some bacteria, the cell walls of cereals can catalyze the hydrolysis of β-glucans, including endo-β-1, 4 - glucanase, endo-β-1 3 - glucanase. The latter is present in cereal seeds, which also includes exo-β-1, 4 - glucanase, exo-β-1, 3 - glucanase. The bacterial (e.g., Bacillus subtilis), Aspergillus (e.g., Aspergillus niger) in the industry, Penicillium (e.g. Penicillium evansi) production. Production of raw materials in beer and malt barley, with the product more. In beer production using β-glucanase, can improve the filtration rate and yield wort, thus ensuring the quality of beer. Can also be used caramel, malt syrup production and as feed additives. 1g enzyme powder (or enzyme solution 1ml) at 50 ℃, pH5.0 under the hydrolysis conditions 1min 1% β - glucan solution to produce 1 μ g of glucose as an amount of the enzyme β - glucanase activity unit of the system. β - glucanase (liquid) ≥ 350 万 u / ml β - glucanase (solid) ≥ 1000 万 u / g effect conditions pH: 4.0 ~ 5.5, 4.8 optimum temperature: 20 ~ 60 ℃, the best 50 ℃. Time: If the reaction can effectively remove glucose and disaccharides, the hydrolysis can be continued with time. Application and effect for saccharification, the recommended dosage is 200m 1-500m 1 (50-150g) / tonne malt dry weight, added at the start mashing. When used in the production of draft beer, wort to join with the fermenter, recommended dosage is 10m 1-30ml (5-10g) / tonne wort. Reduce wort viscosity and improve the filtration rate and improve the brightness clear wort; improving saccharification production capacity can be increased to promote the fermentation of the product; improve the colloidal stability of beer, the removal of β-glucan-induced chill haze; improve the filtration of wine efficiency, increase the batch filter drinker; pure draft beer production can greatly improve the efficiency of the membrane, to extend the life of the membrane. A storage package, the product is a solid powder or liquid formulations, stored in a cool dry place. Second, the temperature is 25 ℃, every three months, less than 5% loss of activity.