The invention discloses a method for producing a furan ammonium salt by using furoic acid. The method comprises the following steps of: (1) chlorination: putting furoic acid and chlorohydrocarbon solvent into an enameled glass reaction kettle, controlling temperature and time, and obtaining a furoyl chloride product; (2) cyanation: putting the furoyl chloride and sodium cyanide into the reaction kettle, stirring, preserving heat, reducing pressure, and reclaiming the solvent to obtain a furoyl nitrile product; (3) hydrolysis: heating the furoyl nitrile and hydrochloric acid, and obtaining furan ketone acid after the reaction is finished; (4) condensation: adding ethyl acetate extract of the furan ketone acid serving as the hydrolysis product into the reaction kettle, dropping methoxyamine to perform room temperature reaction with the hydrolysis product, and demixing, wherein the oil layer is used for ammoniation reaction; and (5) ammoniation: introducing ammonia gas into the oil layer reactant, controlling the temperature, stirring, finishing gas introduction, centrifuging, and drying to obtain the furan ammonium salt. The method is simple and convenient, is convenient to operate, reduces the production cost, improves the yield, makes full use of raw materials, and is safe and reliable in the production process.