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What you are asking doesn't make sense. But perhaps you are asking whether you share in his Canada pension plan retirement benefits?
Where did you live during the course of your marriage? Where does your spouse live now and where do you live now?
It is not sharing his social insurance. You are using the wrong term. You have to be careful to use the correct term or you will never get what you area entitled to.
You will be able to share in the credits that your former spouse acquired during the course of your marriage if you have an agreement that allows this, and order that allows this or you lived in a province that allows this even without an agreement.
Your next step would be to contact Canada pension plan and tell them the facts and ask if you are entitled to a credit split. If you are your next step after that would be to apply for the credit split. The person on the phone will tell you how to get the forms which are available online.
Let me know if you need any further clarification.