Abstract: In order to control the spontaneous combustion in 15106 goaf of Erjing Coal Mine, according to the characteristics of coal seam spontaneous combustion in the self-heating latency, on the basis of analyzing the cause of coal spontaneous combustion in 15106 goaf, the dry ice fire-extinguishing technology was used to make the 15106 goaf quickly filled with flowing carbon dioxide, which has the cooling and inflaming retarding effect to the unkown high temperature point in the goaf. The results show that the dry ice fire-extinguishing technology can quickly deal with the spontaneous combustion of coal in the goaf in the unknown self-heating latency period.