The Australian Government has recognised Venezuela's Opposition Leader, Juan Guaido, as the country's legitimate leader.

It follows similar declarations by the US, Britain, Germany and France.

Venezuela has sunk into turmoil under President Nicolas Maduro, with ongoing food shortages and daily protests amid an economic and political crisis.

In a statement, Foreign Affairs Minister Marise Payne said Australia would support Mr Guaido until elections were called.

"Australia calls for a transition to democracy in Venezuela as soon as possible," Senator Payne said.

"We now urge all parties to work constructively towards a peaceful resolution of the situation, including a return to democracy, respect for the rule of law and upholding of human rights of the Venezuelan people."

The struggle for control in Venezuela turned to the military, as supporters of Mr Guaido handed leaflets to soldiers detailing a proposed amnesty law that would protect them for helping overthrow Mr Maduro.

In a live broadcast, Mr Guaido urged Venezuelans to participate in two new mobilisations in the coming week.

He said that at midday on Wednesday, people should participate in peaceful two-hour protests.

For Saturday he asked supporters to hold mass demonstrations in "every corner of Venezuela" and around the globe.

Mr Guaido said the Saturday protest was timed to coincide with a European Union deadline for Mr Maduro to call new elections.

Earlier, Mr Maduro demonstrated his might, wearing tan fatigues at military exercises.

Nicolas Maduro has cut off diplomatic relations with the US and warned his supporters they could not "trust the gringos". ( Miraflores Palace/Handout via Reuters )

Addressing soldiers in an appearance on state TV, Mr Maduro asked whether they were plotting with the "imperialist" United States, which he accused of openly leading a coup against him.

"No, my commander-in-chief," they shouted in unison.

Mr Maduro responded: "We're ready to defend our homeland, under any circumstance."

Military take centre stage

The duelling appeals from the two rivals again puts the military centre stage in the global debate over who holds a legitimate claim to power in the South American nation.

The standoff has plunged troubled Venezuela into a new chapter of political turmoil that has already left more than two dozen dead as thousands took to the streets demanding Mr Maduro step down.

It erupted when Mr Guaido declared before masses of supporters last week that he had temporarily assumed presidential powers, vowing to hold free elections and end Mr Maduro's dictatorship.

Sorry, this video has expired Thousands protested in Caracas against Mr Maduro's controversial election win.

Mr Maduro had started his second term as Venezuela's President on January 10, following a widely boycotted election last year, which many foreign governments described as a sham.

Venezuela's constitution says if the presidency is determined to be vacant, new elections should be called in 30 days and the head of congress should assume the presidency in the meantime.

But Mr Maduro has so far refused to step down and has accused the Opposition of seeking to stage a coup.

The US has a long history of intervening — both directly and indirectly — to change governments in South America, and Mr Maduro warned his supporters they could not "trust the gringos".

"They don't have friends or loyalties. They only have interests, guts and the ambition to take Venezuela's oil, gas and gold," he said, citing a long list of US-backed military coups, including in Guatemala, Chile and Brazil.

ABC/wires