The competition consisted of 20 teams divided into sections A and B. Section A comprised 12 junior-grade clubs represented by their first-team panels. Section B comprised eight senior/intermediate-grade clubs represented by their second-team panels. Three teams from Section A (quarter-final winners) and one from Section B (final winner) advanced to the combined semi-final stage.[1]
Tullaroan defeated Erin's Own in the Section B relegation play-off by 4–15 to 3–11, preserving their place in the top junior grade. The losing side were demoted to the Kilkenny Junior A Hurling Championship for 2018.