The 48-hour strike action is schedule to start just after midnight on Sept. 30.
The Channel Tunnel rail service suffered a 28 million euro operating loss as passenger numbers fell following terror attacks in Paris and Brussels.
Staff at Eurostar will strike for seven days over two weekends this month in a long-running dispute over work life balance, the UK’s RMT union has said.
Eurostar passenger numbers fell in the first three months of this year linked to the terror attacks in Paris and Brussels, but bookings are strong for Euro 2016 football matches.
Eurostar's profits dropped last year. It has blamed the Paris terrorist attacks, disruptions from migrants getting on to French train tracks and the stronger value of the pound.
Hundreds of passengers have been left stranded after the tunnel linking France and England closed due to a strike in Calais. Rail company Eurostar
Britain is selling its 40 percent stake in Eurostar for 804 million euros. Its part of a national plan to sell off publically owned assets in a bid
Firefighters give all-clear for Channel Tunnel after a lorry fire saw trains cancelled