The rapper posted a link to DirteeTV.com on Twitter today (December 26).
The new tape is called The Mixtape Vol. 2 and is the follow-up to the first volume, which he released on New Year's Day in 2007.
The download is mixed by DJ MK and features new music from P Money, Newham Generals, Bun B and Merky Ace.
Dizzee Rascal is currently recording his fifth studio album, which will be the first the rapper has released since 2009's Tongue n' Cheek.
He will give fans a teaser of his new LP on January 1 when he releases a six-track EP, which will be available to download on iTunes.
On that date the video for a new track titled 'Bassline Junkie' will debut on his online channel DirteeTV.com.
In a statement Dizzee Rascal said: "It's all new material and just a taster of all the good new music we got coming in the new year!
"The 'Bassline Junkie' video is gonna have people in stitches. 1 love!"