Abstract: In this paper, study was carried out on the pulping system for mine fire prevention and extinguishing and comparison was made on the advantages and disadvantages of both the vertical and horizontal pulping machines. Based on the consideration of the economy and reliability and combined with the needs of the modern mine fire extinguishing by grouting, the module design of the pulping mechine was carried out by taking the horizontal pulping machne as the design condition after studying the pulping process and main parameters of the pulping machine. The horizontal pulping machine was divided into four modules, including the quantitative water-feed system, quantitative soil-feed system, continuous pulping system and grouting system. The applications in the fire extinguishing site indicated that the designed pulping machine ran reliably operate and its pulping capacity can meet the requirement of the fire extinguishing at the site.