The US has punitive tariffs on US$50 billion (S$70 billion) in Chinese goods already in place, and another US$200 billion "in the hopper" that Trump said "could take place very soon".
"I hate to do this, but behind that there is another $267 billion ready to go on short notice if I want", Trump said.
"China, right now, is a far bigger problem", Trump said.
The $US200 billion list, which includes some consumer products such as cameras and recording devices, luggage, handbags, tires and vacuum cleaners, would be subject to tariffs of 10 per cent to 25 per cent.
Earlier on Friday White House economic adviser Larry Kudlow said Trump will not make any decisions on his threatened tariffs on another US$200 billion worth of Chinese goods before officials evaluate public comments on them.
Those steps include slapping tariffs on $60 billion of USA imports, Gao said.
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Previous talks between Washington and Beijing did not result in an agreement, and it seems the trade war is likely to escalate further at least until the November mid-term elections.
A worker gestures as a crane lifts goods onto a cargo ship, at a port in Lianyungang, Jiangsu province, China, May 31, 2018. He has pointed to the large USA trade deficit - the gap between US imports and exports - with the People's Republic as a sign of that imbalance.
Major technology company Apple Inc (AAPL.O) said a "wide range" of its products would be hit by the tariffs, but not its iPhone. "These are taxes and they're going to find their way into the pocket book of folks around the country", French said.
The Trump administration has offered aid to farmers impacted by the retaliatory trade moves, which include tariffs on USA crops like soy beans. Among the equipment hit were a number of components and devices used by USA tech firms, including chips and networking gear produced in Chinese factories.
US Trade Representative Robert Lighthizer held another day of meetings with Canada's Foreign Minister Chrystia Freeland on a rewrite of the North American Free Trade Agreement, after reaching a deal last week with Mexico.
Specifically, Kudlow said, the United States was seeking "zero tariffs, zero non-tariff barriers, zero subsidies, stop the IP theft, stop the technology transfer, allow Americans to own their own companies".