The invention discloses an air flue structure of an IPX6 grade equipment cabinet. Air inlet holes and air outlet holes are formed in a cabinet body of the equipment cabinet, sealing covers are respectively arranged at the air inlet hole parts and the air outlet hole parts of the inner side of the equipment cabinet, the sealing covers respectively and completely cover the air inlet holes and the air outlet holes, the tops of the sealing covers are provided with ventilation holes, baffle plates with the inclined air exhaust direction are arranged between the sealing covers and the cabinet body, the baffle plates are positioned between the ventilation holes and the air inlet holes or the air outlet holes, and in addition, the ventilation holes are positioned above the air inlet holes or the air outlet holes. The air flue structure has the advantages that the structure is simple, the waterproof grade improvement is realized through the arrangement of multiple layers of baffle plates, in addition, the manufacturing cost is not obviously influenced, the maintenance is convenient, special outsourcing products are not needed, and the replacement is convenient. The traditional design method is utilized for realizing the IPX6 protection grade and the ventilation heat radiation. Through the installation structure of the inclined baffle plates in staggered arrangement, the blocking effect can be improved, the ventilation is also not influenced, and the water directly or indirectly splashed from the air inlet holes or the air outlet holes can be completely blocked by the inclined baffle plates.