Ba(PO3)2 was introduced to AMCSBY glass to substitute BaF 2, and some properties of glasses were studied. The substituting formula is 10MgF 2-20CaF 2-(10-x)BaF 2-10SrF 2-15YF 3-35AlF 3-x Ba(PO 3) 2(x=0,2,4,6,8). The results of differential thermal analysis on glasses show that the glass forming ability was improved greatly by introducing metaphosphate to AMCSBY glass. Transmission spectra of glasses were measured from UV to IR, and ultraviolet absorption spectra of some glasses were also measured . With metaphosphate′s being introduced, the middle infrared transmittance of glass reduced, and the IR cut wavelength shifted to short wavelength, but ultraviolet transmittance of glass increase, and the UV cut wavelength shifted to ultraviolet wave band. Influenced by PO - 3, the absorption peak of OH group moved to 3145 nm from 2830 nm.