The Labour leader told supporters at a rally how the first speech he ever gave while at Adams Grammar School in Newport was in a debate about bloodsports.
“I grew up in rural Shropshire and the first speech I ever made in my school was of the need to ban fox hunting, hare coursing, badger baiting, and even in those days otter hunting," he said.
“It was a strongly rural area and I lost the debate.
“You can be very clear that any government I am head of would not tolerate this kind of barbarity which his called sport in this country.”
Mr Corbyn spoke out after Theresa May says she would give MPs a free vote in the House of Commons on whether to scrap the Hunting Act if re-elected.
The Act, which was introduced by Tony Blair's Labour government, effectively bans hunting with dogs.
Mrs May has said she is in favour of lifting the ban.
She said; “Some of the other forms of dealing with foxes can be cruel, so my view is it should be a free vote for Parliament so members of parliament individually should be able to exercise their view on this matter."