Hello Ajayrsawant,
I am assuming you are using out of the box workflow or SharePoint Designer workflow. In either case, SharePoint doesn't know the difference between a save and a submit, just that the document in the library has changed. There are a couple hacks you can do to get around this. The easiest thing is to only have the workflow run on a new item, not a changed one. If this won't work for you because you need to run the workflow on changed forms, you can create a promoted property where a particular value is set when they click the submit button. If they don't click the submit button, this value does not get changed. Then you can have the workflow run when that value is present. Hope this helps!