Abstract: In order to solve emissions pollution problem of the trace halogen-bromine in coal combustion product,through fixed bed tube furnace coal combustion experiment,studied the impact on the precipitation of bromide while adding calcium matrix( CaO) as a solid bromide in the process of coal combustion.Results indicate that calcium substrate( CaO) can effectively reduce the amount of bromide,and it can absorb bromide to the maximum and reduce the emissions of bromide while the combination of pre-mixing and injection is used to add the strengthened bromide to the boiler in the process of coal combustion.In addition,the debromination efficiency of calcium bromide fixing agent is influenced by combustion temperature,retention time,quantity of calcium base solid bromide( CaO),and combustion atmosphere.The influence of such factors as the reasonable control of calcium in the process of coal matrix and the reaction conditions of bromide is helpful to improve the efficiency of calcium matrix debromination.