Glass lining is a composite material that is sprayed with glass-lined glaze on the metal surface and adhered by high-temperature glass-lined glaze. It has the chemical stability of glass, and the excellent characteristics of high hardness and high strength of metal materials. At the same time, the surface is smooth and easy to clean. Therefore, it is widely used in chemical, pharmaceutical and other industries. The performance of glass lining depends on the composition of glass-lined glaze. Glass-lined glaze includes matrix agent, opacifier, flux, adhesive, etc. The flux contains low-melting substances, which can reduce the melting temperature and destroy the continuous network structure of the glass-lined glaze to formed new molecular bonds, and then improve the enameling process. The adhesive can chemically react with the metal matrix to enhance the bonding strength of the glass-lined glaze and the metal matrix, thereby improving the mechanical properties. This paper briefly introduced various additives in glass-lined glaze, and focused on the composition and action mechanism of the flux and adhesive. The review provides a reference for designing glass-lined glazes and improving the performance of glass-lined equipment in the future.