Paper file cabinet capable of automatically filling inert gas

The paper file cabinet comprises a file cabinet body and a dehumidification box, a stand column is arranged in the file cabinet body, the bottom end of the stand column is connected with the output end of a first motor, meanwhile, a storage rack is connected to the stand column in a penetrating mode, and a sealing cover is arranged on the outer side of the storage rack; and the sealing covers are fixedly connected through supporting rods. According to the paper file cabinet capable of being automatically filled with the inert gas, the problems of worm damage and oxidation caused by moisture which cannot be solved by a moisture removal mode can be effectively solved through cooperative use of a common gas storage tank and a sealing cover, and nitrogen can be discharged into the sealing cover through the common gas storage tank; the environment of nitrogen with the concentration higher than that of the production environment is not suitable for survival of animals, so that paper archive data stored in the seali