Abstract: Xinjiang high sodium coal is a good steam coal with large reserves. However,the slagging of combustion process is a serious pollution,and influences the safe operation and economics of the boiler. This paper conducted is the study based on one dimensional furnace slagging test bench to compare and analyze the slagging characteristics of two different higher-sodium coals,through experiments. The result shows that in the same volume heat load,the higher- sodium coal of Zhundong has a high slagging characteristics than that of Dananhu high sodium coal. Dananhu coal is harder than Zhundong coal to reduce slagging by burning mixed low sodium coals. The two high sodium coals can be mixed with coal gangue to improve the slagging condition and the best ratio was 10% . The experimental results provide some guidance for the use of high sodium coal in Xinjiang area.