The red phosphors of Ca_0.70Sr_0.18MoO₄:Eu_0.08³⁺, Ca_0.70Sr_0.18−1.5xMoO₄:Eu_0.08³⁺, La_x³⁺ and Ca_0.70Sr_0.18−yMoO₄: Eu_0.08³⁺, La_0.04³⁺, Na_y⁺ were prepared by a hydrothermal method. The crystalline phase, morphology and luminescence characteristics of the phosphor particles were characterized by X-ray diffraction, scanning electron microscopy and fluorophotometry, respectively. The results show that the luminescence properties of Eu³⁺ ions can be evidently improved by co-doping of La³⁺ ions. When the doping mole fraction of La³⁺ is 4%, the relative luminous intensity at 616 nm main emission peak is maximum under the excitation of 395  nm. In addition, the incorporation of doping charge compensators Na⁺ can improve the luminescence intensity of phosphors. The maximum emission intensity is 1.47 times greater than that of phosphor without charge compensation.