Your spouse and dependent children can come to Canada with their partner to Canada; international students can bring their dependents with them when coming to Canada as full-time students on a valid study permit, depending on your course and institution.
As a post-graduation work permit holder, your partner can apply for an open work permit valid for the same duration as your work permit. They can apply when you are already in possession of your post graduate work permit. Also, you must be fully employed in a NOC A, B, or O occupation.