These playoffs determined the Eastern Canadian representative in the 1989 Allan Cup final.
Champions[]
- New Brunswick: Fredericton Alpines
- Quebec: Montreal-Chomedy Construction
Final[]
Best of 5
- Fredericton 4 Montreal 2
- Montreal 8 Fredericton 6
- Montreal 5 Fredericton 2
- Montreal 4 Fredericton 1
Montreal-Chomedy Construction beat Fredericton Alpines 3 wins to 1.
Montreal-Chomedy Construction advanced to the 1989 Allan Cup Final.