Based on IGBT converter circuit, the topology of the main circuit with stray inductance was set up, and the influence of maincircuit stray inductance was analyzed. According to the comparison of calculation, reliability of the laminated bus-bar used in high-powerconverter module was verified, and some factors which affect the inductance of laminated bus-bar were analyzed. Instruction was provided forthe circuit structural design and later optimal design of the high-power IGBT converter module.