Mg2Y8Si6O26∶Ce3+, Mn2+ phosphor was synthesized by the high temperature solid-state reaction, and the structure and luminescence properties were characterized by X-ray diffraction (XRD) and fluorescence spectrophotometer. The XRD pattern demonstrated that the synthetic material belongs to the hexagonal phase of Mg2Y8Si6O26 crystal without detectable impurity and space group P63/m. The excitation and emission spectrum showed that there exist two lattice positions for Ce3+ in Mg2Y8Si6O26 crystal and their luminescence properties were compared. There are two emission peaks at 400 and 600 nm in the emission spectra under excitation at 286 nm, which come from Ce3+ and Mn2+ emission, respectively. It was demonstrated that there exists energy transfer between Ce3+ and Mn2+. The white light can be achieved by changing Mn2+ concentration. It can be used as a potential single-phased white phosphor excited by ultraviolet light.