The invention relates to a standard for determining the spewing potential of grains. The standard for determining the spewing potential of the grains uses sterile malt to exclusively graft mildew, Fusarium to produce spewing factors, and ensures that the spewing amount of beer reaches between 50 and 160g. Compared with the conventional method, the method has the remarkable characteristics of providing the normal standard for determining the spewing potential of the grains, providing a reliable basis for the automatic detection of the spewing potential, ensuring that the product has steady performance, and having high detection accuracy. In addition, the standard has the advantages of reasonable preparation method, simple process conditions, and easy operation. The standard is applicable to mass industrialized production and meets detection requirements.