Fecha de publicación: 11/01/2022 Fuente: WIPO "tobacco agriculture" The invention discloses a preparation method of a cigar tobacco agricultural fermentation aid and an agricultural fermentation method. The preparation method comprises the steps: 1), mixing a flavoring agent and a coloring agent, and obtaining a stock solution A; 2) uniformly mixing a flavor enhancer with water, heating to boil, and taking supernate to obtain a stock solution B; 3) mixing the stock solution A, the stock solution B and a penetrant in proportion to obtain a mixed solution, adding a bacteria increasing agent into the mixed solution, and uniformly mixing to obtain a fermentation stock solution; and 4) uniformly mixing the fermentation stock solution with water in proportion to obtain the fermentation aid. The agricultural fermentation method comprises the following steps: uniformly spraying a layer of the cigar tobacco leaf agricultural fermentation auxiliary agent on the lower leaves of the cigar wrapper and the cigar core by using a sprayer when each layer of the cigar wrapper and the cigar core is stacked, wherein the cigar tobacco leaf agricultural fermentation aid needs to be uniformly sprayed on the leaves on the middle and upper parts of the cigar cores by using a moisture regaining device, and then the cigar cores are stacked. The method can shorten the fermentation time, and is superior to traditional fermentation in the aspects of appearance quality, physical characteristics and sensory quality of tobacco leaves.