In the prior art, on the market, in order to solve the paint spray mist and the waste gas treatment, the traditional process is mostly used, and comprises: a dust-free paint mist collecting pre-chamber constructed from a rock wool plate, a paint spray water curtain cabinet, a ventilation connecting pipeline, a water washing tower dust removal device, a ventilation connecting pipeline, a waste gaspurification device (active carbon adsorption concentrating device, photocatalytic waste gas purification device, low-temperature plasma waste gas purification device and the like), a centrifugal induced draft fan, and 15-m high-altitude discharge. The invention discloses a paint spray mist dust removing and waste gas purification integrated machine, wherein paint mist collecting, paint mist dustremoval and purification, paint spray waste gas purification, circulating water treatment, fan built-in function and other functions are integrated into the one device, and the technology belongs to the environmental protection field, and is used in various paint spraying and coating industries.