The Crusaders ran in five tries in the opening 40 minutes, All Blacks skipper Kieran Read grabbing two, as they had the game won with a 36-3 lead at the break.
The win leaves the Crusaders atop the New Zealand conference and the overall standings, the only unbeaten team after eight weeks.
The Stormers, coming off a 29-16 loss last week to the Kings, sorely tested the Crusaders' defence early, but could only come away with a Robert du Preez penalty.