Park, despite bogeys on the final two holes, shot 4-under-par 67 in Sunday's final round for a 72-hole total of 15-under 269. That tied the tournament record and was two strokes better than 2011 Sime Darby champion Choi Na-yeon, who finished second after an even-par 71 in the final round.
Park, 2-under after nine holes with birdies at Nos. 2 and 3, was down two to Choi going into the final nine holes. But she ran off back-to-back birdies at 10 and 11 and again at 13 and 14.
Choi was actually up three strokes after eight holes Sunday but had a bogey at the ninth hole. She could only answer Park's birdie run with pars and Park was able to take the lead.
Park had a bogey 4 at the 17th hole but Choi's tee shot was unplayable and she ended up with a double bogey on the hole. That left Park with enough of a lead that a bogey at 18 didn't matter.
It was Park's third LPGA title, going with the 2008 U.S. Women's Open and the Evian Masters earlier this year.