Abstract: The principle of dioxin production in modern domestic waste incineration plant was analysed. The method of controlling dioxin content in flue gas has been put forward from the perspective of whole factory. By adopting the ways of pretreatment before charging， 3T+E decomposition（combustion temperature is not lower than 850 ℃， gas residence time is not less than 2 s， strengthen turbulent combustion， control oxygen content）， low temperature synthesis control outside the furnace（control regeneration interval of dioxins， prevent ash accumulation from heating surface） and terminal emission control （such as activated carbon adsorption， SCR） to reduce the generation of dioxin and achieve the control of burning dioxins.