The glass-bottomed structure, which is 1,400 feet long and suspended 1,000 feet above ground level officially opened to visitors in China just 13 days ago.
The official line was that the government was planning urgent maintenance work in the area and the bridge closed on Friday, with a re-opening time to be announced.
A spokesman is said to have told CNN they were “overwhelmed by the volume of visitors”.
He stressed there had been no accidents and the bridge was not cracked or broken.
The glass bridge, designed by Israeli architect Haim Dotan, can accommodate 8,000 visitors a day.
But it is thought 10 times as many people wanted access daily.
Officials at the park announced the closure in a social media post and said the government urgently needed to upgrade the area.