Temporary Resident Visas
Depending on their country of citizenship, your family members they may need to apply for a  (TRV, or “entry visaâ€) that allows them to travel to Canada. If your family members will accompany you to Canada, they can either apply at the same time as you or join you after you have arrived.
To ensure that your family members travelling without you are admitted to Canada as visitors for the length of your study permit, be sure to send them copies of your study permit, Temporary Resident Visa (if you have one) and passport for them to present to the authorities at the Canadian port of entry (airport or border crossing).
Online application for You and Family Members
If you and your family members TRV expires,  you need to apply for new TRVs in order to re-enter Canada at the same time. You can apply for a new TRV in your home country or at the .You can now apply for a TRV online. Do not send your passports until you are asked to do so by IRCC.