The previous record was set in Australia in 2009, with 287 people taking part in the jump attempt.
Becky White, from onesixeight fitness, who is a former student of the university, was the organiser of the world record attempt.
On the day she referred to herself as 'Bouncing Becky', and our Sports Correspondent Steve Clamp interviewed her as part of the Torch Relay celebrations.
Watch becky's interview just before the World Record attempt took place.
Steve was so taken by the idea - he even decided to have a go himself.
Speaking about today's confirmation Becky said:
“I am so proud that we set a world record. It was a fun event to manage and I was really pleased that so many people came along to take part. The sight of more than 300 people bouncing in the centre of campus was amazing. A big thank you – and congratulations – to everyone!”