K2Ba(MoO4)2:Eu3+phosphors　were　synthesized　by　solid-state　reaction.　The　emission　and　excitation　spectra　of　K2Ba(MoO4)2:Eu3+　phosphors　exhibited　that　the　phosphors　could　be　effectively　excited　by　near　ultraviolet　(394　nm)　and　blue　(465　nm)　light,　and　emitted　red　light　at　616　nm.　The　influence　of　Eu3+concentration,　sintering　temperature　and　charge　compensators　(K+,　Na+　or　Li+)　on　the　emission　intensity　were　investigated.　The　results　indicated　that　concentration　quenching　of　Eu　3+　was　not　observed　within　30　mol.　Eu3+,　600　°C　was　a　suitable　sintering　temperature　for　preparation　of　K2Ba(MoO　4)2:Eu3+　phosphors,　and　K+　ions　gave　the　best　improvement　to　enhance　the　emission　intensity.　The　CIE　chromaticity　coordinates　of　K2Ba(MoO4)2:0.05Eu3+　phosphor　were　calculated　to　be　(0.68,　0.32),　and　color　purity　was　97.4.　©　2012　The　Chinese　Society　of　Rare　Earths.