The RDX/RF gel composite energetic particles were prepared by means of emulsion process and sol-gel techniques. The particle size was controlled by the composition of the surfactant system, temperature and time of reaction. The structure of gel particles were characterized by scanning electron microscopy (SEM), BET method, X-ray powder diffraction (XRD),and differential thermal analysis (DTA). Result shows that the particles have a size of 50-200 nm, the explosive is crystallized within the nano-dimensional pores of RF gel matrix. The mean crystal size of RDX in RDX/RF gel composite energetic particles are 30-50 nm. The specific surface area of RDX/RF gel composite energetic particles is 56.3 m²?g^-1 and the temperature of exothermal peak decrease about 33 ℃.