 During the pre-season, Muangthong United signed on many famous players such as Mario Gjurovski, Ri Kwang-Chon, Adnan Barakat, Mongkol Namnuad, and the young player that crowned as best younger of Thailand etc.In 2012 season, the club did not play in the AFC Champions League or AFC Cup.Therefore, it tried to do the best in 2012 Thai League Cup, but they lost to TOT 3–4 and 2012 Thai FA Cup they lost to Army United 3–2, but they can win the 2012 Thai Premier League is a third of the club and Muangthong United became the first team in Thai Premier League to go the season unbeaten in the current 34-game format.