In this study, gelatin-gum arabic nanocapsules containing the two-phase core materials were prepared by complex coacervation, in which the TiO2 nanoparticles modified with stearic acid and dispersed in Tetrachloroethylene（TCE）were encapsulated. The effects of various microencapsulation parameters were also experimentally investigated. The obtained materials were characterized by scan electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicated that the surface of the nanocapsules is smooth and clear. the two-phase dispersion was encapsulated in nanocapsules and the diameter of TiO2 nanoparticles was ~50 nm. The resulting nanocapsules have 0.96 μm in average diameter with a wall thickness of ~18 nm.