Before the start of the regular season, the Torneo Súper 20 took place, which awarded two berths to the 2018 Liga Sudamericana de Básquetbol.

Torneo Nacional de Ascenso Champions Club Comunicaciones covered the berth left by Atlético Echagüe, who lost the relegation playoffs against Boca Juniors.

Libertad conceded their spot due to financial difficulties, and traded places with Salta Basket in the Torneo Nacional de Ascenso, [2] thus ending a streak of 19 seasons in the top flight of Argentine basketball.

The inaugural edition of the pre-season tournament Torneo Súper 20 took place between 20 September and 18 November 2017.

The playoff stage consisted of best-of-three series up to the semifinals, where a final four, single-elimination match format was used.