Belonging to the technical field of sewage treatment, the invention provides an industrial sewage treatment device with exhaust gas purification function. The device comprises a purification treatmentapparatus and a disinfection apparatus. The right end of a blowdown pump is connected to sludge discharge hoppers through blowdown pipes. A biological reaction layer is arranged at the upper side inthe inner cavity of a secondary filtering box. An activated carbon adsorption ball is disposed above the secondary filtering box. A diatomite layer is arranged under a third filer plate, a sand layeris arranged under the diatomite layer, and a biofilm layer is arranged under the sand layer. And ultraviolet sterilization apparatuses are disposed in the inner cavity of a disinfection box. Accordingto the invention, photocatalytic converters are disposed over the biological reaction layer, and can achieve the function of accelerating the purification rate of biological reaction on exhaust gas;an oxygen adding apparatus is disposed at the bottom of the inner cavity in the secondary filtering box, and can achieve the function of blowing in oxygen to accelerate the purification rate of reaction on wastewater. The treatment device provided by the invention has the characteristics of simple structure, strong practicability and good sewage treatment effect.