Along with other unfortunate contestants, the winner is then slaughtered in a sacrificial ceremony organised by the local Taoist temple. This year`s winner weighed in at 844kg (1,861lb).
After its hair is removed, the carcass is stretched across a metal frame and decorated.
The festival happens each year - this image is from 2013. Animal rights activists say the process of fattening the pigs so much is cruel, limiting their movements and putting strain on their internal organs.