Er3+ doped Y2Ti2O7 phosphors were prepared by the high temperature solid state reaction method at 1500 ℃.X-ray diffiraction and luminescence spectra were used to characterize the properties of samples.Due to the layer distribution of Y3+ ions in the pyrochlore Y2Ti2O7 crystal,Er3+ ions,replacing y3+ in Y2Ti2O7 crystal,could realize high-concentration doping by suppressing energy migration between layers to minimize concentration quenching.Investigation on the upconversion characteristic of Y2Ti2O7∶Er3+ showed that the optimal doping concentration of Er3+ was up to 28 mol.％.Y2Ti2O7∶0.28 Er3+ exhibited both dominating red emission under 980 and 1550 nm excitation.The brightness ofY2Ti2O7∶0.28Er3+ were 4 times (980 nm) and 7 times (1550 nm) higher than that of Y2Ti2O7∶0.05Er3+.And Y2Ti2O7∶Er3+ presented much better red emission color purity and stability under 1550 nm excitation.