The invention relates to a dedusting and humidifying device, particularly an industrial gas high-efficiency dedusting and humidifying device. The invention aims to provide an industrial gas high-efficiency dedusting and humidifying device with high work efficiency. In order to solve the technical problem, the industrial gas high-efficiency dedusting and humidifying device comprises a connecting rod, a first spray head, a first hose, a flat belt, a big belt pulley, a second hose, a first rotating shaft, a lower bearing carrier, a hard tube, a second spray head and the like. A left bearing carrier, a right bearing carrier, a servomotor and a fixed rod are sequentially welded and connected on the top in a treating tank from left to right; a screw rod is installed between the left bearing carrier and the right bearing carrier; the left side of the servomotor is provided with a second rotating shaft; and an output shaft of the servomotor is connected with the second rotating shaft through a coupling. The industrial gas high-efficiency dedusting and humidifying device achieves the effects of simple structure, ingenious design and high dedusting and humidifying efficiency, and has the advantages of low energy consumption, energy saving, environment friendliness and high generalizability.