Last night police were waiting to notify next of kin before naming the victims, both of whom were men.
At least three people were killed last year while paragliding, a sport in which participants wearing parachutes are dragged behind vehicles before letting go to fly freely.
A spokesman for Brand's Hatch said the two were attempting a 'tandem flight', wearing a special dual harness attached to one parachute.
Angus Pinkerton, chairman of the flying and safety committee of the British Hangliding and Paragliding Association, which has some 7,000 members - said: 'This sounds to me a very unusual accident. Most accidents that occur are people flying off hills.'
He said paragliders have to take an extensive training course before obtaining a certificate from the BHPA.
Both victims of yesterday's accident were qualified.