They surpassed the previous record of 263-5, set by Royal Challengers Bangalore in 2013
Thailand could manage only 60 runs for 7 in the chase of 131 for the win at Dundee in Scotland on Saturday.
Opener Sanjida Islam’s unbeaten 71-run innings with six boundaries and three over-boundaries helped the Tigresses post 130 runs.
It’s her first fifty in T20 International.
The other opener Murshida Khatun (33) assisted Sanjida before being bowled in the 10th over.
Thailand struggled from the beginning of their innings, losing four wickets to score 20 runs in 10 overs.
Nahida Akter and Shaila Sharmin took two wickets each.