Two Australians have died during a mountain climbing accident in New Zealand.

The two men died after falling hundreds of metres in a horror climbing accident on Wednesday.

Brett Alexander Lentfer, 62, and James Harry Spaile, 44, were killed after their ropes were severed during a climb near Queenstown on New Zealand’s South Island.

The company who organised the climb, Aspiring Guides, said, "we are devastated and our thoughts are with the families and friends of those who lost their lives."