This method specifies a colloidal gold immunochromatographic method for the rapid detection of fumonisin B1, fumonisin B2, and fumonisin B3 (hereinafter abbreviated as FB1, FB2, and FB3) in corn and its milled products. This method is suitable for the rapid qualitative determination of fumonisins (based on the total amount of FB1, FB2, and FB3) in corn and its milled products.