How he can use my citizenship to become a citizen?

You may have options, but I?ll need a lot more information from you, such as how he entered, how many times he entered, when he entered, criminal history, etc.

Generally, in order for a foreign national to become a U.S. citizen, he must go through the naturalization application process, and generally to become eligible for naturalization, one must be over age 21 and must have been a Lawful Permanent Resident for 5 years (the period is 3 years for most Permanent Residents married to U.S. citizens, and actually the application may be filed as early as 90 days before the end of the 5-year or 3-year period). Of course, there are many additional details that determine eligibility for naturalization too. If your husband has been a Permanent Resident since he was one year old, then he now may be eligible to apply for naturalization; if he is not yet a Permanent Resident, then he first may need to apply to become a Permanent Resident. It would be wise for your husband to consult with an immigration attorney who, after learning all of the relevant information, could advise about eligibilities, options and strategies to attain his goals, and who then could offer legal representation in the often complex application process.