Britain's support follows a direct request from the World Health Organisation (WHO) and the government of Sierra Leone for assistance in containing the outbreak.
The facility, including a 50 bed medical unit for treating victims and a specialist 12 bed treatment centre for health workers, will be purpose-built and operated by military engineers and medical staff, Xinhua reported.
The initial phase of the facility will be constructed and operational within eight weeks, a release sent by the Department for International Development said.
Britain's support follows a direct request from the WHO
British military personnel will begin to survey and assess the site later this week. Based near the capital Freetown, the facility will treat victims of the disease, including local and international health workers and medical volunteers.
Announcing the deployment, International Development Secretary Justine Greening said: "Britain is at the forefront of the global effort to tackle this deadly outbreak, having already committed 25 million pounds of support, including frontline treatment and funding for medical research to develop a vaccine."
The scale of the problem, the official added, requires the entire international community to do more to assist the affected countries.