Inhibiting the formation of dioxins in the combustion process which can greatly reduce the investment of terminal treatment equipment is a more economical and environmental friendly method to reduce dioxins. The most commonly used technology, "3T" principle, can reduce the formation of dioxins to some extent, but cannot prevent the generation of PCDD/Fs in the post-combustion region. Therefore, PCDD/Fs produced in the post-combustion region needs to get more attention. At present, the remaining problems of dioxins removal in the post-combustion region are as follows: