Trade Minister Andrew Robb says a new Pacific trade deal offers "enormous prospects" for jobs and economic growth.
Mr Robb will head to Auckland on Wednesday ahead of Thursday's signing of the Trans-Pacific Partnership.
"This offers enormous prospects for driving growth and jobs in Australia," Mr Robb said.
Elements of the deal will require the green light from parliament.
Labor holds concerns about investor-state dispute settlement provisions, which allow foreign investors to sue the government if their profits are affected by any Australian law or policy.
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The opposition will also use the parliamentary treaties committee to test government claims about the trade deal's benefits.
The government says the TPP will eliminate more than 98 per cent of tariffs in the TPP region, removing import taxes on about $9 billion of Australian trade.
The TPP was finalised in October after five years of negotiations, with Australia, New Zealand, Brunei, Canada, Chile, Japan, Malaysia, Mexico, Peru, Singapore, the United States and Vietnam all parties to the agreement.
