google drop my custom page from its index

costom give me a kw,and I create a page for it.many kw in it.first google index it as supplementary, then I add some backlink(in DP sig),then google put it to main index.then I link to the page from my seo site with a h2 title with kw.but now i found google deindex it.

so is it reason backlink let my page out of index of google?

 

Try to submit your site again.
Buying a few powerful backlinks will help too.

 

tell us the url maybe we can tell you something more.

 

google just deindex a page, not the site.

 

the page is 3rd link in my sig.

http://www.jnxwdjd.com/1/试验机/