Lead dimethacrylate (Pb(MA)(2)) was synthesized and copolymerized with styrene and methacrylic acid, and optical resins containing the heavy-metal ion, Pb2+, were obtained. The monomer-solubility phase diagrams and polymer-transparency phase diagrams were determined and discussed in detail. This series of metal-containing resins possessed good visible light transparency, high refractive index, and good thermal stability. The relationship between the refractive index (n(D)), Abbe number (v(D)), heat resistance, radiation shielding properties, and the content of metal salts in optical resins were investigated. The results indicated that adding of metal Pb2+ into the optical resins not only exhibited high absorption for X-ray with good visible light transparency, but could also improve the glass transition temperature and refractive index of polymer materials.