Well I made AFD with three RWY,I mark options closed for take off and closed for landing for grass RWY and I did not connect that RWY with taxiway but anyway AI land here.Why?How can I fix that?Do I need to delete that RWY?

The only 100% sure way to prevent AI from using a runway is to not have it there in the first place. Experience has proved that closing a runway with and AFD program DOES NOT guarantee that the AI will not use it.

There are some additional tricks you could try first, if you want to keep the runway texture in your file. It might help if you post a screenie of your afcad so I can see what's going on...

Thank you guys ,AFD is for LYBT and this is test example for future project,
I already delete RWY.When I finish my AFD I will attach it here and notify you Dan.
cheers
P.S. if you think on trick with different type of grass poly ,I know for that

I can't speak for AFD, however ADE9 has a selection called "false" in the traffic pattern selection. I have found that the AI traffic appear to avoid it.