Anwil Włocławek defended its title and repeated as Polish champions.

[1] Czarni Słupsk withdrew during the 2017–18 PLK season because of financial problems.

On 17 May 2018, Spójnia Stargard promoted to the PLK as the winners of the I Liga, after defeating Sokół Łańcut 3–0 in the playoff finals.

[2] Also, during the pre-season, PGE Turów Zgorzelec withdrew from the tournament.

Quarterfinals and semifinals are played in a best-of-five format (2-2-1) while the finals in a best-of-seven one (2-2-1-1-1).