This paper discusses the cold storage characteristics and the formation mechanism of gas hydrate, studies the selection and substitution of g-h for cool storage air conditioning, the advantages of using g-h formed by multiple refrigerant and water soluble substances as cool storage medium, the effect of additives and the outfield on g-h formation, the characteristics of g-h slurry, the method that accelerates the rapid formation of g-h, the improvement of cold storage device and the requirements of ideal g-h. The flow performance of g-h slurry is the key whether g-h slurry can be applied to air conditioning well, so using CFD sets up the flow model of CO2 g-h slurry in pipeline, whose flow was simulated. Analysis of the pressure drop when the g-h flow in the Vertical bend. Research shows that the characteristics of CO2 g-h slurry is very suitable for the air conditioning system. Finally the paper puts forward some existing problems of g-h cool storage technology to make it practical.