Red phosphors Ca0.7Sr0.18MoO₄:0.08Eu³⁺,Ca0.7Sr0.27MoO₄: 0.02Bi³⁺ and Ca0.7Sr0.18－1.5xMoO₄:0.08Eu³⁺,xBi³⁺ were prepared by high temperature solid-phase method reaction.The influ ence of the concentration of Bi³⁺ on the luminescent properties of phosphors.The phosphors are characterized by X-ray diffraction (X RD) and fluorescenc e spectrophotometer,and the luminescent properties are characterized by excitation spectra and emission spectra.The experimental results indicate that the phase structure of the phosphor Ca0.7Sr0.15MoO₄:0.08Eu³⁺,0.02Bi³⁺ is scheelit e structure.Bi³⁺ ions can transfer the absorbed energy to Eu³⁺ ions in red phosphors of Ca0.7Sr0.15MoO₄:0.08Eu³⁺,0.02Bi³⁺．When t he dopi ng mole fraction of Bi³⁺ is 0.02,the relative luminous intensity of 616nm main emission peak is the maximum under the excitation of 312nm,due to t he ⁵D₀→⁷F₂transition of Eu³⁺.However,th e phenomenon of concentration quenching occurs when Bi³⁺ doping concentration is higher .The luminescent performance of phosphors are reduced.