My blog posts's page rank-3. But my home page's page rank-0!!! How???

You need more backlinks for your main page

 

There are more people that noticed your blog and linked to it or subcribed to a particular article. Also blogs with certain tags for less competitive keywords will get you ranked better. It is not uncommon to have people access your site through another page than your index.

 

As PR stands for Page Rank so it is possible tht u have done more work with your internal page as compare to home page of ur blog..ths is not an issue u may take benefit of ur internal page also..

 

Why not? All the individual page have own PR.
I believed that you got more backlink point to your blog compare to your website

 

People like your blog posts and sharing it. Make your home page as much interesting as your blog. So that people linking it naturally. You can also build one way links for home page.

 

This is actually not all that rare. It means that more or higher quality BL's are pointing to your commentin page than to your index page.

 

O,o this same my blog....

 

wierd. This happned to me once with 1 of my websites. Really odd.

 

that could be a good reason.

 

some high pr pages are linking to the inner pager..i have the same phenomenon in one of my sites

 

your post is better to build backlink

 

It's easy to understand. Your pagerank is come from backlink. When other pages to your page, your page pagerank will increase.
So, It's not confused that your homepage has no pagerank but your page has 3 pagerank. Because your page is linked ( get backlink ) by other pages.

 

Its possible that your blogs links are viral on batter pagerank websites or any other place that's give link juice to your blog pages.