Played under a regionalised, knock-out format, the 2017–18 competition was the fourth to be held since the tournament was expanded to include clubs from outside the Welsh Premier League.
As well as the 12 Welsh Premier League clubs from the previous season, the top five qualifying clubs from the northern and southern feeder leagues would enter the tournament, along with a number of wildcard entrants.
The New Saints reached their tenth final and won the match 1–0, retaining the trophy and securing their ninth title.
Their opponents were fellow Welsh Premier League side Cardiff Met who made their first appearance in the final.
The match was played on Saturday 20 January 2018 at Park Avenue, Aberystwyth.