The synthesis method comprises the following steps: S1, adding furandicarboxylic acid into a reaction container, adding a certain amount of
methanol, adding a double-acid-site strong acid
solid catalyst, starting stirring, controlling the
reaction temperature to carry out
esterification reaction, and after the reaction is finished, filtering, washing and
drying to obtain furandihydrazide; separating out the double-acid-site strong acid
solid catalyst to obtain
clear liquid, namely dimethyl furandicarboxylate; s2, transferring dimethyl furandicarboxylate serving as a
raw material into another reaction container, adding a certain amount of
sodium formate serving as a catalyst, then adding a proper amount of hydrazine
hydrate, controlling the
reaction temperature, keeping a
reflux state, reacting for a period of time, cooling to
room temperature after the reaction is finished, and performing
centrifugal separation to obtain white
solid furandihydrazide. The synthesis method has the advantages of simple reaction steps, no need of toxic and harmful catalysts, mild
reaction conditions, high conversion rate and high yield, and can realize efficient, green and low-cost production of furandihydrazide.