Angolan officials said all movement of people from northern Luande Norte province to DR Congo would be stopped.
The outbreak in DR Congo was the first in Africa in several months and the fourth in DR Congo since 1976.
It is believed to have infected at least 40 people of which more than ten have died.
So far there have been no cases of ebola in Angola, but Angola police and military were on alert for signs of the disease at the border crossing.
