For this season, the
Swiss Football Association (ASF/SFV) had been reduced to from 13 to just 12 member clubs in the top-tier and 24 clubs in the second-tier. This was one Nationalliga team fewer than in the last season and two teams less than the previous season. This happened because the league format had been modified. From here onwards the format would remain unchanged. The 12 top-tier teams played a double round-robin to decide their league table positions. Two points were awarded for a win and one point was awarded for a draw. The first placed team at the end of the season would be awarded the Swiss championship title and the last placed team would be relegated to the
1939–40 1. Liga. ==Nationalliga==