Abstract: Four co polymers were synthesized from methyl methacrylate and fluorescent colors of 1,8 naphthalimides containing polymerizable group via free radical co polymerization. Their relative molecular weights were characterized by gel permeate chromatography (GPC) and the contents of fluorescent colors bonding with methyl methacrylate were calculated by the curve obtained from standard samples. By using spin coating, polymer thin films were prepared. Their absorption and emitting spectra both in solution and in films were given.