The Eu2+ and Dy3+ codoped Ba2MgSi2O7 phosphor is synthesized via high temperature solid state reaction. The phase identification shows that the calcining temperature of this material is 1250°C. The photoluminescence analysis presents that the emission of this phosphors shifts from 440nm to 500nm as the phase become purity monocline Ba2MgSi2O7. The decay curve and the TL illustrates that this materials shows a weak afterglow with a short duration owing to the deep trap. This deep trap has a strong ability to store the trapped carriers. So the application of this materials can be extended.