Poonia flung the hammer to a distance of 81.47m, going past the previous mark of 75.45m held by Ashish Jhakar by over six meters.
Poonia's effort was the world's fourth best throw recorded by an U-18 men's athlete this year. The 18-year-old from Rajasthan's dominance was such that he beat second placed Updesh Singh by nearly 15 meters.
The silver medal winner could only fling the hammer to a distance of 66.93m.
Bronze meanwhile went to Rajasthan's Praveen Kumar who recorded a throw of 65.06m.
To put Poonia's throw in perspective, the men's U-20 hammer throw was won by Uttar Pradesh's Vikranta who threw the hammer 69.46m.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)