Abstract: In this paper,the factors affecting the particle size and distribution of emulsion explosive mixture were studied,such as emulsifying agents and its contents within different components in oil-phase. And the change of the particle size and its distribution were further tested with temperature changing by high-low temperature circulation test and the influence of above factors on the stability of emulsion explosive were researched and the results tested showed that emulsifying effection with mixture emulsifying agents are better than that with solo emulsifying agent.And more diswider is particle size and distribution and more better its storage stability.