Today i created a subreddit very simply but after that my user account get banned can anyone tell me why or reddit have any new rules for creating subreddit? please help
Why don't you contact their support and see why you've been banned? If it was a mistake then they'll be able to unban you.
I suggest contacting support to try to figure out what happened, you will get a direct answer and if they do not why they can always review your sub reddit.