Abstract: The influence of altering firing temperature and time on the mechanical properties and microstructure of the meatalporcelain interface were studied.The experimental results showed that the reaction in the metal-porcelain interface was very complicated, and the phases of metal-porcelain interface were mainly SnO₂, SnCr_0.14O_x, AlNi₃, KAlSi₂O₆ composite oxides etc.The kinds, quantities and distributions of the interface reaction products were affected by vaviations of firing technological parameters changing, which finally determined bonding strength of metal-porcelain interface.In certain range, the interfical reaction layers widened and the mutant metal-porcelain interface changed into compound type as firing temperature increaseing and firing time prolonging, which played an important role in increasing metal-porcelain interface bonding strength.The bonding strength was 42.7 MPa with firing temperature of 960℃ and firing time of 2.5 min.