Hi Dear friends, I want to start my PhD thesis wrotting in latex,,could u please send one latex format file.

If you google you get so many format files and you can choose the one you like.

-H

You might be better off to find someone from your school who has submitted an approved thesis prepared with LaTeX. In my time, schools had different format requirements and were quick to reject any manuscript that deviated in the smallest detail from their specifications. I have no expectation that they might have changed in the intervening years.

Alternately, find a style that is close. Then as you gain experience with TeX and LaTeX you can modify it to fit your school's requirements.