The South Australian Liberals will spend more than $12 million to open four new trade offices if the party wins the 2018 state election.
Opposition Leader Steven Marshall says offices would be opened in Japan, Malaysia, Dubai and the United States.
It comes on top of an earlier pledge for a Liberal government to build a new freight-only airport east of Adelaide, to boost trade.
"A stronger South Australian trade footprint in countries of the highest potential offer the prospect of increased jobs and investment at home," Mr Marshall said.
"Trade offices provide on the ground support for exporters enabling them to develop the deeper, longer term engagements necessary to prosper in foreign markets."
Mr Marshall said increased trade assistance was part of the opposition's plan for an export-led transformation of the state economy which would be further underpinned by the airport plan and new road and rail infrastructure.
"The faster and cheaper South Australia's world-class product can get to international markets the greater the return to our farmers and manufacturers," he said.