I want to evict my mother in law of my property,how do I go about it

Can't you line up other accommodation for her and ask her nicely? Or are the circumstances so bad that this has be done by eviction practices?

www.evictionresources.com

Where do you live ? Eviction rules vary from France, to US, to India and so on.

Is she visiting for a few days, or has she moved in.
Your wife ( since it is her mother) is she in agreement,

ANY question on law needs to include your general locale as laws vary by area.

If she is a tenant or resident, you evict the same way you would any tenant. The general process is a termination notice in writing. If they don't vacate by the deadline, then you go to court for an eviction order.

One caveat here is that if your spouse is a part owner of your property she has to agree with removing her.