Fecha de publicación: 16/09/2022 Fuente: WIPO Wine The invention provides a brewing method of flos carthami double-petal rose melot wine capable of increasing the malic acid content. The brewing method of the Merlot wine capable of increasing the malic acid content comprises the following steps: step 1, adding 50-110 g of crushed flos carthami double-petal roses after calyx parts are removed into 1 L of Merlot grape mash which is detected by PCR (Polymerase Chain Reaction) and contains heat-resistant kluyveromyces MAE1 genes, and mixing; 2, adding 40-80 mg/L of sodium metabisulfite, adding 200 mg of activated saccharomyces cerevisiae, adding 1% citric acid, adjusting the pH value to 4.0, and fermenting at 22-27 DEG C for 7-10 days; and 3, separating the peel residues from the red flower double-petal rose melot wine, storing the wine liquid in a disinfected fermentation tank, and filling the wine liquid in the fermentation tank until 90% of the wine liquid is fermented. The brewing method of the Merlot wine capable of increasing the malic acid content, provided by the invention, has the advantages of retaining color, improving taste and increasing the content of pyruvic acid.