Ufuk Talay's Young Socceroos side were rarely threatened on their way to securing the title and made up for the side's embarrassing 5-1 loss to Thailand in the group stage of the competition.
Western Sydney Wanderers player Keanu Baccus opened the scoring after only 10 minutes to give the Young Socceroos a 1-0 lead.
Melbourne City winger Steve Kuzmanovski doubled the lead moments later with a clinical finish after a slick counter attack from the Australia midfield.
Despite a number of quality chances, Australia would go into the break with only a 2-0 lead.
Thailand provided brief resistance at the start of the second half but goals to Joe Champness, George Blackwood and a second for Kuzmanovski put the result beyond doubt.
Thailand claimed a late consolation goal in the dying stages however it was a night for the Young Socceroos to savour.
Sydney FC striker and Young Socceroos captain Blackwood won the competition's golden boot award with five goals.