She has also picked 16 wickets at 20.25, and has become the second New Zealand player after Amy Satterthwaite to win the award.
"I'm riding the wave at the moment, but I know these things won't last forever and it's about making the most of the opportunities I get at the top of the order," Devine told cricket.com.au.
"Everyone's who's played this game knows how fickle this game can be and how form can change, not just between games, but within a game it feels sometimes."
Meanwhile, WBBL Team of the Tournament has also been announced and is captained by Melbourne Renegades skipper Jess Duffin. It features players from six of the eight clubs.
WBBL Team of the Tournament Jess Duffin (captain), Sophie Devine, Beth Mooney, Danni Wyatt, Meg Lanning, Ellyse Perry, Jess Jonassen, Marizanne Kapp, Molly Strano, Megan Schutt, Belinda Vakarewa