The invention discloses a preparation method for N-alkyl-2-methyl-5-formyl-3-pyrrole formate and application of N-alkyl2-methyl-5-formyl-3-pyrrole formate in cigarette flavoring. The preparation method comprises the following steps: with D-glucosamine hydrochloride as a raw material, reacting D-glucosamine hydrochloride with acetoacetic acid esters in an aqueous NaHCO3 solution so as to produce a 2-methyl-5-1',2',3',4'-tetrahydroxybutyl-3-pyrrole formate derivative; then preparing 2-methyl-5-formyl-3-pyrrole formate under the action of sodium periodate; and then reacting 2-methyl-5-formyl-3-pyrrole formate with halogenated hydrocarbon in the presence of tetrabutylammonium bromide and anhydrous potassium carbonate so as to obtain an N-alkyl-2-methyl-5-formyl-3-pyrrole formate derivative. The preparation method is simple; and after application of the prepared derivative in a cigarette, fragrance quality of the cigarette is improved, fragrance quantity is increased, fragrance becomes soft and fine, and remaining fragrance is comfortable.