The music festival organizers had halted performances for several hours on Saturday during another thunderstorm, temporarily sending some 92,500 fans to their cars and tents for safety, but vowing to resume the open-air event.
However, with more storms forecast, authorities in the area revoked the event's license early on Sunday morning.
Organizers said they regretted the decision but accepted it because of the need to ensure the safety of fans. They asked participants to clear the festival grounds by noon on Sunday.
The event website initially reported 42 people were injured during lightning strikes, but the numbers rose to more than 80.
The sell-out festival, now in its 31st year, took place at the airport in Mendig, near the Nuerburgring motor racing track.
At least eight people were hospitalized, according to the German Red Cross, ABC NEWS reported.
Most were now in good condition, except one man who had to be resuscitated at the scene and remained in hospital.