A novel broadband emission phosphor Ca 2 KMg 2 V 3 O 12 was first synthesized by solution combustion method. The X-ray diffraction showed that Ca 2 KMg 2 V 3 O 12 phase can be obtained at 600–900°C through combustion route. The crystal structure of this material was refined by Rietveld method using powder X-ray diffraction. It crystallizes in cubic system and belongs to space group Ia3d with z=8, a=0.12500nm. The excitation band of Ca 2 KMg 2 V 3 O 12 peaks at 320nm in a region between 260nm and 425nm, and the emission spectrum exhibits an intense band centered at about 528nm covering from 400nm to 800nm. The colour coordinates of samples prepared at different ignition temperatures are in a range of x=0.323–0.339, y=0.430–0.447.