I have been on SSDI for 15 years and am 65 years old. My wife just turn 62 years old and applied for SS.Does she get a part of SSDI or my life earnings?

I don’t think so, if she is not disabled. Has your wife worked all these years? If so she would draw off of her own benefit.
You need to call your local social security office and ask them directly. 62 is the youngest age one can apply for any S.S. benefit but you will forfeit around 30% by taking it earlier than full retirement age.

I think that there is a matrix to determine the amount of the benefit and if the benefit is higher as your spouse, based on your previous earnings then she is entitled to that. Otherwise, her benefit will be based on her own earnings.