All most all inner page url are broken.

i have never bulilt links to innerpage before and i only bulild links to homepage. it got my hompage top 30. After i lost my data and i move my site to new host. allmost all inner page lost and their urls are broken, meanwhile, i buy some links to homepage from broker. my homepage ranking down dramtically from about 40 to 240 for 3/4 keywords. i do not know why? what to do then?

 

Your question sounds quite familiar. Perhaps you already posted this with a different account.

Search engines hate broken links. You need to try to fix all of those broken links if possible. You could try submitting a sitemap to Google Webmaster Tools, but it still might take a while for search engines to forgive you for all the broken links.

Is your website only 1 page now? If so, it is not surprising that you lost your rankings. Your internal pages help reinforce the theme of your website and they provide internal links.