Leading 7-3 at half-time, the Crusaders showed their dominance in the second half, scoring immediately after the break and running away with the contest.
Ethan Blackadder scored two tries while Cullen Grace, Bryn Hall, Tamati Williams and Leicester Fainga'anuku all scored one each.
The Crusaders now have six wins from eight matches, and will travel to Sydney to take on the Waratahs this Saturday.
In the afternoon match, the Brumbies beat the Highlanders 28-17.