Brazell, who represented the Cricket Australia XI in the carnival, was the highest runscorer in the series with 417 runs at 59.57.
The 16-year-old left-hand batsman was also one of three South Australians selected in the Australia under-17 squad, joining SA captain Josh Hoffmann and Thomas Kelly.
Kelly scored 313 runs at an average of 44.71 and Hoffmann made 248 runs at 31.
Cricket Australia National Talent Manager and National Selection Panel member Greg Chappell said:
“The most pleasing feature of this year’s Under 17 National Championships has been the quality of the batting, which I think has been as good as it has been for some time.
“These boys will go on to play as a team at the Under 19 National Championships, and will come into calculations for the Australia Under 19 team that goes to New Zealand in January to play in the 2018 ICC Under 19 Cricket World Cup.
“All of the players selected are very exciting young cricketers who have performed well at this carnival, and we look forward to seeing how they step up at the next level.”
Australia Under 17 Squad
Kyle Brazell, Cricket Australia XI
Damien Burrage, Western Australia
Oliver Davies, NSW Metro
Will Fort, ACT/NSW Country
Mackenzie Harvey, VIC Metro
Josh Hoffmann, South Australia
Thomas Kelly, South Australia
Liam Marshall, NSW Metro
Todd Murphy, VIC Country
Dominic O’Shannessy, ACT/NSW Country
Patrick Rowe, VIC Country
Ajay Singh, NSW Metro
Matthew Willans, Queensland
Glenn Winsor, ACT/NSW Country
Under 17 National Championships Award Winners
Player of the Tournament: Kyle Brazell (Cricket Australia XI)
Player of the Final: Liam Scott (NSW Metro)
Highest Run Scorer: Kyle Brazell (Cricket Australia XI) - 417 runs at 59.57
Leading Wicket Taker: Dominic O’Shannessy (ACT/NSW Country) - 16 wickets at 13.63
Most Dismissals: Harry Walker (Queensland) - eight catches, two stumpings
Spirit of Cricket: Victoria Country