my step dad got deported over 8 months ago my mom followed him to mexico shes a us citizen their married and have 3 kids all born in the us

I understand you want to bring your stepfather back as quickly as possible but more information is needed to determine if he is eligible to return. Not every person who is deported is eligible to return. Individuals who are eligible to return typically require an immigrant visa petition to be approved as well as an application for permission to reapply for admission and waiver. This is a complicated case. You should at the very least consult an attorney. You will need to know as much as possible about your stepfather's immigration and criminal histories. You can read more about hardship at http://myattorneyusa.com/extreme-hardship.