Abstract: The development experience of the European unified electricity market can provide significant inspiration for the construction of the Chinese electricity market. The day-ahead electricity market is the basic link and essential component of the European unified electricity market. Firstly, the basic situation of the European day-ahead electricity market is sorted out, the concept of main market orders is introduced, and the characteristics and applications of market orders are further summarized and compared. Secondly, the basic model for European day-ahead electricity market clearing is built, the main process of the solution algorithm is given, and its basic principle is analyzed. At the same time, the case analysis and application expansion are carried out.Finally, combined with the research focus on the European day-ahead electricity market, the future development trends are analyzed, and the enlightenment and suggestions for the construction of the Chinese electricity market are summarized and proposed.