What is the difference between this two sentences? I looked into the google,and found that these two sentences are used.
Both forms are correct and mean the same thing.
The adjective "above" can be used as a post-positive adjective. In some cases post-positive adjectives can vary the meaning of the sentence, but not in this case.
...above analysis... : normal adjective use
...analysis above... : post-positive adjective
In general, post-positive adjectives are rarer, and can signify archaic use. The post-positive adjective use looks more formal to many (due to the archaic nature / rarity of the construction in general), so I've seen it used commonly in formal contexts.
Edited: Thanks to Edwin pointing this out, I did a bit more research on how common each construction is. What I found is that until the 1990s "the above item" was more common than "the item above", but recently the latter construction has become more common [Link]. However, the use of "the below item" seems to be negligible compared to "the item below" [Link]