The invention discloses multilevel combined waste gas purifying equipment, wherein a waste gas sucking device A guides waste gas into a spraying device B, the spraying device guides the waste gas into a cyclone material collector C, and the cyclone material collector C transfers the waste gas and liquid miscibility ingredients into a backflow pipe K and a liquid bath J; and the gas pipeline C4 of the cyclone material collector C is connected with an induced draught fan D. Furthermore, the outlet of the air pipe of the induced draught fan D is connected with a water filtering device G, the water filtering device G guides the separate liquid into the backflow pipe K, and the backflow pipe K is communicated with the liquid bath J. The outlet of the air pipe of the induced draught fan D is connected with a cyclone material collector F, and the cyclone material collector F transfers the waste gas and liquid miscibility ingredients into the backflow pipe K and the liquid bath J. An active carbon purifying device is further connected to the other end of a double-layer hollow U-shaped pipe of the water filtering device G. The multilevel combined waste gas purifying equipment disclosed by the invention has the beneficial effects of capability of processing various industrial waste gases, flexible application of the combined design, high waste gas processing efficiency and good purifying effect.