At 9.25am, rescuers from Vachira Hsopital were called to the scene and found the victim, Thammanoon Prateep, 34, lying under the tree and appeared to be unconscious.
After performing CPR on him, rescuers rushed him off to Vachira Hospital but he later died of severe lung injuries.
Officials say Mr Thammanoon climbed 10 metres high to reach for a coconut, but he slipped and fell to the ground.