West Midlands Police said the men were wounded at the National Exhibition Center, near Birmingham in central England. They were taken to hospital with non life-threatening injuries.
Police said the shooting occurred Tuesday as several people were ejected from the venue for trying to get in without tickets.
"Firearms were discharged and two stewards were taken to hospital with gunshot wounds. Their injuries are not believed to be life-threatening," the force said in a statement.
The concert was the last stop on West's Touch the Sky tour of Britain.