PNG batted first and set a target of 190 after batting out the full 20 overs.
Jason Kila top scored for PNG with an impressive knock of 74 runs. Kila smashed 9 fours and 3 sixes.
Sione Manumu'a was the best of the Tongan bowlers taking 3/26.
Tonga ' s top order batsmen in Alois Pau'u (22) and Maamaloa Kuluka (21) steered Tonga 's innings in the opening overs but their dismissals sparked a major batting collapse.
Tonga lost their last 7 wickets for only 18 runs.
Jason Kila with the ball proved deadly snaring 3/7. Tonga were all bowled out for 76.