Up-conversion phosphor BaxNayYzF2x+y+3z+3m∶Er3+m is synthesized by low-temperature combustion synthesis method. The phase and morphology of the phosphor are analyzed by X-ray diffraction and scanning electron microscopy, and the optimal formula is obtained by orthogonal experiment. The effects of doping concentration of Er3+ and Y3+ ions on green and red up-conversion is studied by measuring the up-conversion luminescence property of samples with different doping concentrations. The results show that increasing the doping concentration of Y3+ ion is beneficial to green up-conversion luminescence, increasing the doping concentration of Er3+ ion is beneficial to red up-conversion luminescence.