First of all you need a Google FeedBurneraccount to enable this feature. Most bloggers use this service to manage their feeds. If you use Blogger and have not done it yet then set-up FeedBurner first. Next, sign in and go to “Publicize” tab.
Under it, find and go to “Socialize” tab as shown in the image below.
Now all you have to do is add you Twitter Username and select the proper “Formatting Options” that you like to have for your automatically tweeted blog posts.
At last, scroll down to the bottom of the page and click “Save” to activate the service. After this, whenever you publish a new blog post, it will get added to your Twitter account.

