The invention provides sealing glass capable of resisting a high temperature of 550 DEG C. The sealing glass comprises the following components in percentages by mass: 20 to 40% of SiO2, 10 to 25% of Al2O3, 5 to 15% of ZnO, 10 to 20% of BaO, 1 to 10% of TiO2, 1 to 5% of Li2O, 1 to 5% of K2O, 10 to 25% of Cr2O3, 10 to 20% of SrO, 1 to 5% of WO3 and 0 to 12% of PbO, CaO and MgO. According to the invention, a silicate glass system is adopted; elements like titanium, lithium, potassium, strontium and tungsten are added; the internal structure of glass is improved; on the premise of guaranteeing that the glass has high softening temperature and expansion factor similar to the expansion factor of kovar alloy, air tightness and electric insulation properties of a glass insulator are improved; thus, a glass sealing material with a usage temperature capable of reaching 550 DEG C and with good electric insulation properties and air tightness is prepared.