Abstract: In order to study the fire prevention and control features of the high water backfill material and to promote the application of the material to the mine fire prevention and control area,according to the flame retardant performances of the high water backfill material and the conventional loess material,a comparison experim ent study was conducted and the flame retardant effect and function mechanism were analyzed.The comparison experiment showed that the high water backfill material would have a certain restrained effect to the oxidation and temperature rising rate of the coal spontaneous combustion during the coal spontaneous combustion and oxi dation process and the indicated gas(CO、CO_ _2 and C_ _2H_ _4) generation rater from the oxidation.Under the same water and cement ratio,the high water backfill materi al would have higher coal spontaneous combustion and oxidation restrained effect than the loess material.The combined practices and application of the fire prevention and control engineering showed that the flame retardant effect of the high water backfill material was better than the loess material,and the high water backfill material would fully replace the loess material as the backfill material of the mine fire prevention and control.