The belligerent big-hitter finished four votes ahead of Perth Scorchers star Shaun Marsh to be the best player of the popular and exciting domestic Twenty20 tournament.
The second place finish for Marsh is reward for his turnaround from state exile to playing a key role in the Scorchers' rise to the BBL final against Brisbane Heat on Saturday night.
Finch, 26, polled 21 votes, in front of re-energised Scorcher Marsh on 17, while Melbourne Stars' imported Sri Lankan slinger Lasith Malinga finished in third place with 16 votes.
It was a tie for fourth between Hobart Hurricane and recently retired Test great Ricky Ponting and Brisbane Heat duo Luke Pomersbach and Chris Lynn, polling 12 votes apiece.
Pomersbach has returned from the wilderness with the Heat in remarkable fashion, after leaving WA cricket because of drug and alcohol problems.
The Player of the Tournament was voted on by umpires on a 3-2-1 basis at the end of every match of the regular season.
Finch amassed 309 runs in his seven matches for minor premiers the Renegades, at a staggering average of 77.25 and a strike rate of 128.21.
His top score was an unbeaten 111 against cross-city rivals the Melbourne Stars in the opening match of the competition.
Finch led his Renegades to the semi-finals of the glamorous tournament but they were bundled out in dramatic fashion, as another retired Test star Mike Hussey hit the winning runs for Perth at the WACA Ground on Wednesday night.
Finch also broke through for his first international appearances this month, in the first and second one-day international clashes with Sri Lanka last weekend.
Heat batsman Lynn was awarded the BBL's Young Gun award, ahead of Ben Cutting and Nathan Coulter-Nile.