Craig Jones got one back from a penalty corner after 25 minutes, but Queensland's clear advantage in fitness was already beginning to show.
They added another before the break, then conceded another just after halftime to make it 3-2.
Additional goals to Tyler Gilmore and Joel Rintala made the game safe at 5-2, before Jones dribbled along the baseline to give Jury Herewini an easy tap home finish.
Queensland added two more before the finish - one from a penalty corner and the other after 14-year-old Maori goalie Isaac Amaru (Aquinas College) had been pulled - leaving only the excellent Connor Herewini to finish with a well-deserved goal on the buzzer to make it 7-4.
Queensland under-21 7 (Joel Rintala 2, Clinton McKay 2, Christian Ramsay, Tyler Gilmour, Josh McPaul) New Zealand Maori under-21 4 (Jury Herewini, Connor Herewini, Bevan Taylor, Craig Jones)
Story Isaac Amaru: Page 24