hello!
i want to do phd in family law related issues.Can anybody send me his or her sample research proposal to guide me as how to write a good research proposal for a law related Phd.

There are a lot of sources out there for guidance in doing a research proposal. Chances are that the universities that you are interested in will have some sort of guidance on their websites. The proposals that universities want may vary in length and style, so you would be well advised to be aware of the particulars wanted by any specific university.

As well, I cannot fathom how you could do a PhD proposal without SOME idea of what topic you want to address and why, and what original elements you think that you can contribute via your finished PhD research. A good read of the current literature ought to get you going.

NO. Its not in your interests for someone to do so. Do it yourself, and if you can't a PhD isn't for you.