Silicate strontium phosphor for white light LEDs was synthesized by high temperature solid-state method. The structure, surface, excitation and emission spectra of Sr3SiO5: Eu2+ phosphor which contain different mass fractions of BaF2 were measured. The results show that BaF2 quantity affects the structure, surface and spectra of Sr3SiO5: Eu2+ sample. The sample has the best properties when the BaF2 concentration comes to 2.0wt%. The structure of sample is tetragonal phase Sr3SiO5. The emission and excitation spectra peaks locate respectively at 575nm and 537nm. The samples can be excited by InGaN blue chip. The emission peaks appeared apparent red shift with the increase of BaF2 concentration. A white light emission spectrum with good color rendition was obtained by coupling the phosphor with blue chip.