The invention discloses a waste gas purification apparatus which is formed by connecting a gas suction port, a cooling purifying box, a circulating purifying box, an adsorption box and a blower through pipes. After waste gas enters the cooling purifying box from the gas suction port, since the cooling purifying box is provided with drag plates which are staggered in a longitudinal tilt mode, the waste gas generates an inhomogeneous flow, and a cooling water atomizer thoroughly mixes the atomized cooling water with the waste gas to cool down, thereby removing high-molecular pollutants in the waste gas; the waste gas enters into the circulating purifying box to be circularly cooled and atomized in the circulating purifying box, thereby thoroughly removing the macromolecular pollutants in the waste gas; other micromolecular pollutants in the waste gas are adsorbed and removed in the adsorption box, thereby realizing discharge after reaching standards; and sewage from the cooling purifying box and the circulating purifying box is processed by a filter and an adsorber, and flows back to the water inlet pipe, thereby realizing sewage reutilization.