In this these, excitation power and temperature dependent photoluminescence (PL) were used to investigated the optical properties of Cd1-xMnxTe epilayers which were grown on Si (111) substrates by molecular beam epitaxy. The PL spectra of CdMnTe epilayers show a significant increase in the intensity of exciton-related emissions and a reduction in the intensity of defect-related emissions with increasing Mn content.