The 2020–21 season is Buriram United's 9th season in the Thai League. (11th if including P.E.A.'s two seasons) The club will enters the season as the Thai League runners-up, and will participate in the top-level league. They will also participate in the domestic cups, FA Cup, and continental cup, AFC Champions League, which they will start at preliminary round 2 for the first time since 2013 season. This is Buriram's first season without Suchao Nuchnum, the club's former captain who played as midfielder, due to his announcement on November 26, 2019.