A　series　of　Eu3+-doped　red-emitting　phosphors　Ca8Mg(SiO4)4Cl2　were　synthesized　by　a　sol-gel　method.　The　as-synthesized　phosphors　were　characterized　by　X-ray　diffraction,　scanning　electron　microscopy　and　photoluminescence　spectroscopy.　Effects　of　Eu3+　adding　amount　and　charge　compensation　agent　(i.e.,　Li+,　Na+,　K+)　on　the　emission　intensity　of　the　sample　were　investigated.　The　results　indicate　that　the　phosphors　can　be　efficiently　excited　in　a　near　ultraviolet　light　of　393　nm.　The　most　intensive　emission　intensity　of　the　Ca8Mg(SiO7)4Cl2:Eu3+　phosphor,　which　is　prepared　with　Na+　ions　at　the　Eu3+doping　content　of　3%　(in　mole　fraction),　can　be　obtained.　The　chromaticity　coordinates　of　the　Ca8Mg(SiO4)4Cl2:Eu3+　phosphor　are　calculated　to　be　x=0.641　and　y=0.358,　located　in　the　red　region　of　the　CIE　1931　chromaticity　diagram.　©　2016,　Editorial　Department　of　Journal　of　the　Chinese　Ceramic　Society.　All　right　reserved.