'This feels fantastic,' Jaidee said. 'This win is better than last year. I just told myself to play my own game. The driver didn't work well for me today, but the irons worked nicely.'
Jyoti Randhawa fired a 5-under 67 in the final round to finish at 18-under-par 270. Henrik Stenson finished one stroke further back at minus-17 after a Sunday 67. Niclas Fasth and Paul McGinley both shot 68 in the final round to share fourth place at 12-under-par 276.
Jaidee led by six strokes entering the round and was able to extend that lead early on. He drained a birdie try on the fourth. The Thailand native picked up another birdie at six to get to 21 under.
The 34-year-old tripped to a bogey at the par-4 ninth on the Palm Course at Saujana Golf & Country Club. Jaidee faltered again as he bogeyed the 11th, after hitting his tee shot out of bounds, to slide back to minus-19.
After he parred the 12th, Jaidee and Randhawa each birdied the 13th as Jaidee maintained a three-shot cushion over his playing partner.
Jaidee picked up another birdie at the 16th. He parred his final two holes to become the first back-to-back winner of this event since Graham Marsh in 1974-75.
Randhawa birdied the fourth to start his round, but stumbled to a bogey at the next. However, he quickly climbed the leaderboard from there.
The India native dropped in back-to-back birdies from the seventh. Around the turn, he birdied the 10th to get to 16 under.
Randhawa birdied the par-5 13th to keep going. For the week, he played the par-5 seventh and 13th at minus-10 with six birdies and two eagles over the four rounds. The 32-year-old closed with a birdie at the last to take second place by himself.
'The bogey on the fifth was a little disappointing as it took the wheels off,' said Randhawa. 'After missing the birdie on the 14th I didn't really have a chance. Thongchai made a great recovery on the 11th after hitting it out of bounds. I thought after that we might have a chance as he was looking at making a possible six. But he recovered well with a five.'
Stenson had the best run going as he birdied five of his first 11 holes to jump to 17 under and within two shots of Jaidee. However, he was side-tracked by a bogey at the 13th. He did birdie the 15th before closing with three straight pars.
'I lost the momentum a little on the 13th,' said Stenson. 'I hit a so-so shot, misjudged the wind and ended up on the rocks. I went for the pin to try and catch up two shots at once there, but it didn't work out that way.'
Spaniard Miguel Angel Jimenez closed with a 3-under 69. He was joined in a tie for sixth place at 11-under-par 277 by Prom Meesawat, who carded a 1-over 73 in the final round.
Padraig Harrington, the top-ranked player in the field, struggled to a 2-over 74 in the final round. He ended the event at minus-10 and was tied there by Wen-Chong Liang (69) and Gary Orr (68).