The calcium magnesium silicate (CaMgSi 2 O 6 ) phosphor activated with the trivalent/divalent rare-earth ions R 3? /R 2? (R 3? /R 2? = Ce 3? ; Sm 3? ; Eu 3? ; Eu 2? ; Dy 3? and Tb 3? ) ions were synthesized by the solid state reaction method. The crystal structure and luminescence properties were investigated by X-ray diffraction and photoluminescence analysis in detail. The crystal structures of sintered phosphors were monoclinic structure with space group C2/ c. The excitation spectra of CaMgSi 2 O 6 :R 3? /R 2? indicated that all samples could be effectively excited by near UV light. Emission spectra of the samples have emitted strong violet-blue, orange-red, blue, near white light and green light, due to the characteristic transitions of Ce 3? ; Sm 3? ; Eu 3? ; Eu 2? ; Dy 3? and Tb 3? respectively. Thus, based on the favorable photoluminescence properties under the near UV light excitation, these phosphors could be nicely suitable for the white light emitting diodes.