Biomass,as a renewable source with zero carbon emission,is regarded as a promising alternative fuel to coal. Coupling combustion with pulverized coal is one of the key technologies to realize the utilization of biomass. In order to study the influence of pulverized coal coupling combustion of biomass,the coupling combustion of biomass in a pulverized coal boiler of 300 MW power station was numerically simulated,and the effects of biomass mixing ratio and powder feeding temperature on the parameters in the furnace were discussed. The results show that as the proportion of biomass increases,the oxygen consumption in the furnace decreases,and the concentration of CO and char decreases,while the NOx emission increases at outlet. A lower temperature input of biomass only causes a slight increase of oxygen concentration and a decrease of CO concentration in the main combustion area,which has no significant change to the parameters in the furnace. It means that a slight adjustment of biomass feeding temperature could not cause a significant influence for combustion in the furnace.