The 1990 CIAU Men's University Cup Hockey Tournament (28th annual) was held at the Varsity Arena in Toronto, Ontario. The Toronto Varsity Blues served as tournament host.
Note: * denotes overtime period(s)
The bracket matches rotated so that the Atlantic entry played the Western entry while the Ontario entry played the Quebec entry in the semifinals. All rounds were single elimination.
Note: * denotes overtime period(s)[1]