I am PR and I want to sponsor my partner who is currently working in Canada in closed work permit. We lived together for more than one year however our relationship is quite new as well. My family doesn’t know about our relationship as my family doesn’t like him when I introduced him before when he was still pursuing me. Only our friends know and they are supporting us. Will that affect to our application due to absence of approval of family?
Whether your parents approve or not should have no impact on its own. Just explain that parents don't approve and show other proofs of relationship. I do not understand your comment 'however our relationship is quite new as well.'
That said: you say you lived together before you became a PR, but you also said ~six months ago that you were in a long distance relationship.
-If you lived together before/when you became a PR, there is a risk they will look at this and see that you were in an undeclared common law relationship. (I can't say because you don't put dates). If that is the case, you will not be able to sponsor him - ever.
-If you plan on claiming common law - DON'T muck about with dates. You risk getting banned on misrepresentation if the facts don't fully match up. Get married instead.