CHINA's Ministry of Commerce has announced it will re-examine anti-dumping duties on US chicken broiler parts after the World Trade Organisation (WTO) ruled against Beijing in the four-year-old dispute.

US chicken exports to China have fallen 90 per cent over the past four years, costing sellers an estimated US$1 billion, after China imposed high anti-dumping duties.

A WTO panel ruled in favour of a US complaint on August 2 and adopted the decision on September 25 without further appeal from China, Reuters reported.

"The Commerce Ministry has decided, with effect from the release of this notice, to carry out another investigation in this case in accordance with the ruling and suggestion of the relevant report by the WTO experts group," the ministry said in a website statement.