Abstract: The structure aspects of sulfur incorporation in borosilicate glasses need to be understood to increase the sulfur loading in the glass. Raman spectroscopy was used to characterize sulfur environments in the borosilicate glasses in this study. The Raman spectroscopy data show that sulfur exists in the form of sulfate in the waste glass. SO₄ tetrahedron is surrounded by Na⁺, Ca²⁺ or other cation and sulfate is located in a cage of glass network without bonding. According to the structure theory, the method was put forward to increase the sulfur content in the glass. The decrease in the network formers concentration and increase in the network modifying concentration, such as alkaline earth oxides, resulted in the relax network and more big net cavities which enhanced the dissolution of sulfate in the glass.