CHINA will levy an additional 50 per cent tariff on US goods on top of 34 per cent already announced, reports London's Financial Times.

The Office of the Customs Tariff Commission of China's State Council said the new tariffs would take will amount to 84 per cent, and will hit American exports of machinery, semiconductors, agriculture and other goods.

The total level of Chinese tariffs on US goods would be more than 100 per cent once Thursday's levies came into effect, economists said. A large portion of US farm, energy and other exports were also affected by separate additional tariffs imposed earlier.