Two goals apiece from Jakub Blaszczykowski and Robert Lewandowski earned Jurgen Klopp's side a comfortable victory on the final day of the season, extending their unbeaten run to a record 28 matches and taking them to a new league record of 81 points.
It was a one-sided game to round off a dominant season from Dortmund, who picked up the trophy in front of over 80,000 fans at the Westfalenstadion.
Dortmund needed just five minutes to show why they have successfully defended their Bundesliga title.
Ilkay Gundogan put the ball through into the path of Blaszczykowski, who slotted his shot through the legs of Freiburg goalkeeper Daniel Batz to give them a flying start.
It was a familiar scene which repeated itself three more times in the first half with the Freiburg defence finding no way of dealing with Dortmund's long balls over, round and through their defence.
The next goal came 15 minutes later with Neven Subotic this time sending the ball forwards from within his own half and Lewandowksi took the ball down well on his chest and still had time to dribble it wide of Batz and slot it into the open goal.
Lukasz Piszczek created the third in the 27th minute when he cut in from the right and the sting was taken out of his near-post shot by Batz, but the ball was an invitation for Lewandowski to bag his 22nd goal of the season.
In the 39th minute, yet another ball over the Freiburg defence was met by Blaszczykowski, who headed it over the onrushing Batz with just enough power to beat Matthias Ginter's attempted goal line clearance.
Shinji Kagawa had the next chance in the 41st minute from another ball over the top, but his shot was too weak from 15 yards out.
Marcel Schmelzer was the next to be put through early in the second half, but he tried to tee up Lewandowski to complete his hat-trick rather than shooting himself and the chance was wasted.
Lewandowski sent a header against the post a minute later as Dortmund showed no mercy on their opponents.
In the 66th minute, the Pole hit the crossbar with a lob over Batz as he was again denied a hat-trick.