Prince Harry visited a village near to a minefield and met children who are given lessons in how to avoid detonating the explosives.
The Halo Trust has cleared 120,000 landmines in Angola, left over from years of civil war.
An estimated 60,000 people have been killed or injured by mines in the country since 2008 and about a thousand minefields are still to be cleared.
“The remnants of war still threaten lives every day,” said Prince Harry, patron of the Halo Trust.
He also spent time with the British charity during a visit to Angola in 2019 when he walked through a partially-cleared minefield and set off a controlled explosion.
Earlier this week, Prince Harry met Angola’s President Joao Lourenco, where the prince welcomed the government’s renewed support for the charity’s work.
James Cowan, the Halo Trust’s chief executive, said: “We will continue our work in solidarity with the Angolan people until every last mine is cleared.”