US President Donald Trump says the US will impose 10% tariffs on $200 billion US dollars worth of Chinese imports in the latest escalation in a trade dispute between the world's two largest economies.

China earlier warned it would have no choice but to retaliate, imposing a 10 per cent tariff on US products it previously designated for a rate of 20 and 25 per cent.

China's Finance Ministry said its tariff increases were aimed at curbing "trade friction" and the "unilateralism and protectionism of the United States".