The RDX with fractal structures was prepared by the evaporation of solvent on glass substrate, and was characterized by scanning electronic microscope (SEM). The effects of solution concentration of RDX and surfactant on the fractal structure were studied. The formation mechanism for fractal structure of RDX was discussed. Results show that the different fractal structure of RDX can be obtained by means of non-equilibrium crystallization on glass substrate. The dendritic growth of RDX occurs with low concentration of RDX 16 mg·mL^-1), while the random fractal growth occurs with high concentration of RDX (26 mg·mL^-1). The influence of the surfactant of hexadecyl trimethyl ammonium chloride on the morphology of RDX is obviously.