What have to do wife,She get green card thru marriage with US citizen. She found what he not divorced. She can be citizen ?

You are going to have to ask the question a little more clearly than that. I understand that English may not be your best language -- perhaps you should meet with an attorney in person and with an interpreter. She cannot be married to two people at the same time. That is as much as I can make out of the question you have asked.

If she is still married, then uscis may deny her citizenship & begin deportation proceedings against her. She should consult with a professional to review the issue closer.

If the US citizen was already married the green card holder will likely have her green card revoked and be placed in removal/deportation proceedings. She should hire an immigration attorney as soon as possible.