A high Verdet constant Faraday rotator glass has been studied in this work. Based on a Tb2O3-B2O3-Al2O3-SiO2 system and using the special techniques, a 0.5L sizesample of high Vetdet constant glass TG28 with high optical quality could be obtained inplatinum crucible. Experimental results show that the Verdet constant of TG28 is as high as -97.44 Rad/T·m.