Abstract: Flexible Power Technology is an important course for graduate student majored in electric engineering.Traditional teaching method hardly meet the academic programs demands of the course，therefore，the case library teaching method of flexible power technology was put forward.Multiple cases were interspersed in each chapter to form a teaching model based on theoretical research，with case analyses as the main line and simulation software as a tool，which could stimulate students′ learning initiative，as well as enhance their abilities to analyze practical engineering problems and research.