The efficiency and the affecting factors of ozone oxidization for explosive wastewater containing RDX were studied by related experiments with letting continuously O₃ into the water. The concentration of RDX and COD value of the wastewater were monitored during the process of oxidization. The results show that 3.0 mg·L^-1 O₃ makes 10 mg·L^-1 RDX remove 58.01% through oxidation of 2 h, and when pH value equals to 12,O₃ removes 83.15% RDX through oxidation of 4 h. At the same time, increasing pH value and temperature, decreasing RDX concentration are useful to increase the RDX removal efficiency by ozone oxidization. Therefore,ozone oxidization processes are suitable for treating the RDX wastewater with high pH value and low concentration of RDX.