Sm-doped Cd₃Al₂Si₃O₁₂glass was synthesized by solid state reaction. The transmittance spectrum, emission spectra, excitation spectra and near infrared emission spectra of the glass with the excitation of 488nm Ar⁺ laser were measured at room temperature. The spectral prop erties of Sm³⁺ ions in the glass were investigated. Under 365nm, the sampl e emits intense orange-red light peaked at 603nm due to⁴G_5/2→⁶H_9/2 transition. With the excitation of 488nm Ar⁺ laser, the sample gives rise to intense near infrared emission at about 1202.5, 1293.5 and 957.5nm.