Abstract: In order to enhance the efficiency of mine plugging and leaking wind, we applied polymer water gel which compounded by CMC and aluminum citrate to study fire preventing and extinguishing in coal mine. Self-designed viscometer and plugging and leaking wind measurement device are used to test the viscosity, gelling time, rheological properties and plugging and leaking wind performance of the gel. The funnel combined with real-time viscosity of the gel is used to determine the gel time. In the theoretical dosage ratio range, we preferred the mass fraction of CMC 2.0% and 2.5% gel. These two gels can significantly enhance the effect of plugging and leaking wind, achieve internal and external integration in plugging and leaking wind.