The Msimbazi Street side now lead with 57 points from 24 games, followed by defending champions Yanga who have 50 points.
Third-placed Azam FC also have 50 points but Yanga are better placed on goal difference. The two have so far played 21 games each.
Coastal Union who beat Yanga 2-0 and Azam FC 1-0 remain in the bottom of the 16-team league with 19 points.
Striker Daniel Lyanga scored the first goal for Simba in the 39th minute before Hamisi Kiiza added the second in the 52th minute.