Double-shell structure green electrophoretic particles (PIB/CT/S) were prepared through a sol-gel process in reverse microemulsion combined with surface solvent polymerization. The green nanoparticles (CT/S) were prepared by using silica spheres (S) as the matrix and CoTiO3 as the first coating. CT/S had a good spherical structure, with an average diameter of 191.2 nm and a particle density of 2.5644 g/cm3. In order to reduce the particle density, ionic liquid polymer poly [1-vinyl-3-dodecyl] imidazolium bromide (PIB) was used as the second coating to coat CT/S to obtain bivalve green electrophoretic particles (PIB/CT/S), 1.7905 g/cm3 and had excellent hydrophobicity and dispersion stability in the electrophoretic solution tetrachloroethylene (1. 623 g/cm3). The response time of the simple electrophoretic display was 165 ms which was significantly better than that of the green electrophoretic display reported at present.