You can import Tumblr to WordPress in several ways. The easiest way to import your Tumblr Blog into your WordPress blog is to use this web page:

http://haochen.me/tumblr/

Follow the directions.

If you need more instructions on how to actually import the XML into WordPress, click on this link  backup-the-posts-and-pages-of-your-wordpress-website (pr4 ) and navigate to 'Restore your WordPress content, using the xml backup file'.

There's also a WordPress plugin tumblr-importer (pr6 | 4 star rating |19 ratings) you might also consider.