A closing round 68 saw Paul Dunne claim a share of seventh place, four shots behindBjork.
Dunne began the final day two shots adrift joint-leaders Adrian Otaegui and Matt Wallace and for the second successive round, didn’t drop a single shot.
Meanwhile Bjork carded seven birdies in a flawless closing 65 at Topwin Golf and Country Club to finish 18 under par, a shot ahead of Spain’s Adrian Otaegui.
Otaegui was left to rue a three-putt bogey on the 17th, although a birdie on the last sealed outright second ahead of compatriot Jorge Campillo and the English pair of Matt Wallace and Jordan Smith.
Bjork began the day a shot behind Wallace and Otaegui, but made an ideal start with a birdie on the first and picked up further shots on the fourth and eighth to reach the turn in 33.
The 27-year-old also birdied the 11th, 12th and 15th to move ahead of clubhouse leader Smith, who had surged through the field with a superb 64, before a birdie on the 17th capped a nerveless display.
“It’s tough to describe the emotions,” Bjork told Sky Sports. “I’m really, really happy, really proud of myself the way I played today.
“It’s probably one of the best rounds of golf I’ve ever played, I would say the best round given the situation. I made pretty much no mistakes today so I’m super happy.
“I had a really good feeling this morning actually. I was less nervous than I usually am before a really big final round. I felt confident almost all the way so I guess it was just meant to be.
“I didn’t look (at leaderboards) too much the first nine holes but from 12 I knew I was up in the lead, but then I saw a guy had finished on 16 under and I knew I needed to make birdies. That actually helped me to stay positive instead of playing safe.
“I just lost out in Hong Kong in the first tournament of the season with a bad finish and I was close last week (in the Hassan Trophy) so it was my turn today and I’m so happy for that.”