The invention relates to an air purification explosion-proof device comprising a pipeline at the corner. One end of the pipeline communicates with a furnace chamber channel, and the other end of the pipeline communicates with a smoke discharging channel; an explosion-proof opening is formed in the pipeline; an explosion-proof cover is arranged at the upper end of the explosion-proof opening; elastic devices are arranged on the two sides of the explosion-proof opening correspondingly; the lower ends of the two elastic devices are both fixedly connected with the pipeline, and the upper ends of the elastic devices are fixedly connected with the explosion-proof cover; a circle of sealing ring is arranged at the edge of the upper end of the explosion-proof opening, and a first magnetic ring isarranged at the circle outside the sealing ring; a second magnetic ring is arranged on the explosion-proof cover and located on the corresponding upper portion of the first magnetic ring; and an air purifier is arranged in the position, close to the explosion-proof opening, of the pipeline. Compared with the prior art, the air purification explosion-proof device is simple in structure and stable in operation, a smelting furnace can be closed automatically, and airtightness is good; and the air purifier conducts air purification on the explosion-proof cover, and thus the operation environment is guaranteed.