You can integrate Tumblr into your Twitter feed by authorizing the service to access your Twitter account. Tumblr for Twitter can share new posts with your Twitter followers automatically when you post them and display your Twitter feed on your Tumblr page. Your can toggle whether or not Tumblr is linked to Twitter on your customization page.
Instructions
1. Go to the "Customize" page to change your Tumblr page. You can access this from your dashboard by clicking the "Customize" link on your sidebar or from your Tumblr page by clicking "Customize" in the upper right corner.
2. Click the "Services" on the top navigation bar. The second option down will be "Twitter" then click the "Sign in with Twitter" button.
3. Allow Tumblr access to your Twitter account; the notification for this application will pop up in a new window (or tab depending on your browser settings). Click "Authorize App."
4. Select the check box beside "Send my Tumblr posts to Twitter" to send every new post to your Twitter feed. If you leave this unchecked you can still choose to send posts to Twitter when we create or reblog them. Likewise, you can deselect this option on a post even if you select it here.
5. Click "Save & Close" to save your Twitter settings.
Tags: your Twitter, Tumblr page, Twitter feed, your Tumblr, your Tumblr page