Is it ok to share/show(for review) the proof that you made for your research paper on stackexchange
You've done some original research, you get very exited, and you want someone to share it with. Often MSE is the easiest place to find an audience. I am often tempted to post parts of my research there, but try not to.  For one thing my discoveries always seem obvious after I've made them, and I worry about being scooped.  That's my biggest fear.  And your posts on this site stay up FOREVER. Most journals will probably not care because most accept papers after they have been posted on Arxiv.  But, if you end up using part of someone's answer in your paper, ethically you should cite them. I would rather torture myself for a few more days and come up with a perfectly clear and logical proof on my own than cite some guy on SE. 

That being said, if you really want to use MSE for proof checking here's what I suggest.  Try to find the specific part of your proof you are unsure about, and then craft a question that is as general as possible but such that an answer will let you know if you were correct.