Pettersen produced a three-under 69 at Sunrise to finish at 19 under as she earned $300,000 for her 10th LPGA Tour title.
The Norwegian is in scintillating form having beaten Catriona Matthew in a play-off last week in South Korea.
Park, who won two weeks ago in Malaysia for her second victory of the year and leads the money list, finished with a 74 which proved insufficient.
Yani Tseng, the top-ranked Taiwanese player who won the event last year, produced a 71 to finish third at 15 under.
Matthew was fourth at 14 under after a 70, while Michelle Wie had a 76 to tie for 23rd at one under.
- Sports & Recreation
- Catriona Matthew