UV-transmitting borophosphosilicate glasses series, 2Al 2 O 3 −xSrO–(18−x)ZnO-33.3P 2 O 5 –16.7B 2 O 3 –30SiO 2 glasses with x=0–18mol% were prepared and studied. The substitution of SrO for ZnO increases the density and the thermal expansion coefficient (α), but decreases the molar volume (V m ). The glass transition temperatures (T g ) and softening points (T d ) vary within a small range. The relative chemical durability was determined by measuring the weight loss of a polished glass sample after immersion in deionized water at 50°C for 24h, the chemical durability of the glasses increases when x≤9, and drops when x>9. With the increasing SrO content, the UV transmittance of the glasses decreases mildly. The compositional dependence of E opt shows a decrease trend with increasing SrO content. The structural changes with the glass compositions were examined by FT-IR and Raman spectra.