The crystallization point of ammonium nitrate supersaturated aqueous solution was tested by using Tyndall method,based on different crystallization point,emulsion explosive was made,and the high-low cycle test was carried out.The influences of crystallization point of water phase on storage stability of emulsion explosive was researched,the experimental results show that the crystallization point of water phase has an important influence on storage stability of emulsion explosive,lower the crystallization point of water phase,better the storage stability of emulsion explosive.