The invention discloses equipment for treating high-temperature dust-containing smoke. The equipment comprises a settling chamber and a secondary combustion furnace, wherein the settling chamber comprises a settling chamber main body; the settling chamber main body is provided with a converter smoke inlet and a converter smoke outlet; a dust collection trolley is arranged at the lower part of the settling chamber main body, and a sealing door is arranged on the side wall, corresponding to the dust collection trolley, of the settling chamber main body; the secondary combustion furnace comprises a secondary combustion furnace main body; the secondary combustion furnace main body is provided with a smoke inlet, a flow baffle, a pressure transducer, a temperature controller, an oxygen lance and a smoke outlet; a CO concentration detector is arranged at the smoke outlet; a dust collection trolley is arranged at the bottom of the second combustion furnace main body, and a sealing door is arranged on the side wall, corresponding to the dust collection trolley, of the secondary combustion furnace main body; and the smoke outlet of the settling chamber main body is connected with the smoke inlet of the secondary combustion furnace main body through a smoke flue. According to the equipment disclosed in the invention, the temperature of the high-temperature smoke can be reduced, the large-particle lead dust can be settled, the incompletely combusted coke breeze, CO and Dioxin in the high-temperature smoke can be treated and eliminated, the pressure of follow-up dust removal equipment is lightened, and the smoke is enabled not to contain the hazardous substances such as CO and Dioxin.