Abstract: In the context of China's carbon peaking and carbon neutrality goals, how to efficiently utilize carbon-containing waste has received widespread attention. This paper introduces the current situation of carbonaceous waste utilization and the research progress of fluidized bed blending firing of carbonaceous waste and coal. This paper focuses on three key issues in the process of carbonaceous waste co-combustion with coal in fluidized bed: combustion control in the co-combustion process, pollutant emission characteristics of co-combustion in fluidized bed, and ash accumulation and slag corrosion characteristics. Firstly, in the combustion control of co-combustion, the blending of agricultural and forestry biomass can improve the combustion performance compared with coal combustion. While sludge blending has a negative impact on combustion stability. The optimal combustion parameters need to consider the fuel characteristics of both coal and carbon waste, and the reasonable air distribution for the fuel characteristics can make the fuel burn completely. Secondly, in terms of pollutant emission control, fluidized bed blending firing with carbonaceous waste is cleaner than other methods. However, more advanced technology is needed to meet the ultra-low emission standard. There are ultra-fine limestone desulfurization technologies for SO₂ and different low-NO_x combustion technologies for NO_x. Finally, in terms of ash slag corrosion, the blending firing of carbon-containing waste needs to focus on the problem of ash slag corrosion caused by alkali metals and S and Cl elements, which can be mitigated by fuel pretreatment or additives. Control of furnace chamber temperature can slow down the rate of ash slag corrosion. Materials can be replaced with corrosion resistant materials or arranged with corrosion resistant coatings. For fluidized bed blending of carbonaceous waste, how to cleanly and efficiently treat carbonaceous waste while maximizing the utilization of energy needs further in-depth study for specific problems.