Belmont scored 30 of the game's final 38 points to win its NCAA-best 31st straight conference home game.
Ahead 55-51 with 11 minutes to play, Nick Smith, Dylan Windler and Kevin McClain each hit 3-pointers during a 13-0 run for a 17-point lead. Eastern Illinois only made one field goal in the final six minutes.
Craig Bradshaw made four 3-pointers and scored 14 points with five assists for Belmont (11-6, 3-0 Ohio Valley). Taylor Barnette added three 3s and finished with 11 points for the Bruins, who were 15 of 36 (42 percent) from 3-point range.