The Champions League is divided into three parts, namely, the qualifying stage, the play-off stage and the race stage. The qualifying stage includes preliminaries (semi-finals and finals, one final), the first round of qualifying, the second round of qualifying and the third round of qualifying. The Champions League qualifiers (excluding the preliminaries) and the Champions League play-offs are mainly two rounds of away games. The second round of preliminaries, the third round of preliminaries and the play-offs are divided into "the way to win the championship" and "the way to the league". A total of 32 teams participated in the group competition, which was divided into 8 groups with 4 teams in each group. The top two players in the group stage entered the knockout stage, and the third player participated in the European League knockout play-offs. 1/8 finals, 1/4 finals, semi-finals are mainly two rounds away. The finals were held in a neutral venue, and there were no three or four competitions. If the two sides draw at the end of the 90-minute regular time, they will enter 30-minute overtime, and if the overtime is still undecided, they will enter a penalty shootout.