The invention provides a method for rapidly and efficiently synthesizing 2,5-furandioic acid under the action of a metalloporphyrin catalyst. The method includes the following steps that (1) 5-hydroxymethylfurfural is dissolved in a solvent to obtain a mixed system for standby application; (2) the metalloporphyrin catalyst and an oxidant are prepared to a mixed solution for standby application; (3) the two prepared mixed solutions are reacted by a microchannel modular reaction device; and (4) the product after the reaction is collected and analyzed. The method for preparing the 2,5-furandioicacid by adopting a microfluidic field reaction technology has the characteristics of high catalytic efficiency, mild reaction conditions, high yield of a target compound, convenient operation, and thelike.