Reducing NOx formation during pulverized coal (PC) combustion process is the simplest and most efficient way to minimize NOx pollution. PC preheating and combustion technology has been paid more and more attention because of its great potential in low NOx combustion. The key idea of preheating-low NOx combustion is that before pulverized coal enters the furnace for combustion,the pulverized coal is preheated by setting an independent physical space with high temperature,low oxygen and strong reducibility,and the volatile is rapidly precipitated and transformed in the preheating area,so as to promote the release of volatile N and increase the proportion of volatile N reduced to N2,so as to reduce the probability of N in coal being oxidized to NOx. Meanwhile,by integrating low-NOx technology,such as air staging and MILD combustion,the formation of NOx is further reduced. So far,according to different preheating heat sources and preheating devices,PC preheating technology can be divided into gas-fired preheating,fluidized bed preheating and self-preheating burners. Among them,self-preheating burner organically combines the pulverized coal self-preheating technology with the radial and axial multistage step-by-step air distribution technology,fuel concentration and dilution separation and graded powder feeding technology through optimal design,which has the advantages of low cost and transformation flexibility while ensuring high efficiency and low NOx. The self-preheating burner shows excellent operation stability,load adaptability and low NOx production by integrating self-preheating,multi air staging,fuel-rich/lean separation and fuel staging technology.