Albirex Niigata (S) are the defending champions, having won their first trophy the previous year.

If the teams are still tied, a penalty shoot-out is held to determine a winner.

The draw for the preliminary round was held on 9 May 2017 at Connaught Drive.

Eight teams involved in this round will play in a single leg knockout basis.

The 4 winners from the preliminary round will join DPMM FC, Tampines Rovers, 2016 runner up, Albirex Niigata (S) and 2016 winner, Home United in the draw.