A series of Dy 3+ doped Ca 19 Mg 2 (PO 4 ) 14 phosphors were firstly synthesized by the solid-state reaction method. The phase purity and characteristic luminescent properties are investigated in detail by X-ray diffraction refinement, photoluminescence spectra and decay times measurement. Under 365nm excitation, Ca 19 Mg 2 (PO 4 ) 14 :Dy 3+ phosphor can exhibit intense warm white emission with CIE chromaticity coordinates (0.400, 0.452) and low correlated color temperature (3994K). The optimal doping contents of Dy 3+ in Ca 19 Mg 2 (PO 4 ) 14 is determined to be 2%. The thermal quenching property of Ca 19 Mg 2 (PO 4 ) 14 :Dy 3+ is also investigated and it remains 60% of the initial emission intensity even when the temperature increases to 230°C. The results show that Ca 19 Mg 2 (PO 4 ) 14 :Dy 3+ can be a promising single phased white emitting phosphor for UV white LEDs.