Rome’s firebrand interior minister accused the European Commission President if driving up borrowing costs for Italy.
Mr Salvini’s, who is also leader of coalition partner League, outburst came after Mr Juncker’s appeared to help the yield on Italian bonds to a four-and-a-half year high of 3.4 percent.
Mr Salvini said: “The European commission president Juncker, by equating Italy with Greece, sends the spread gap crazy. He could have spared us that.”
“He should drink two glasses of water before opening his mouth, and stop spreading non-existent threats. Or we’ll ask him for damages,” the Italian added.
The row around Italy’s draft budget continues after Rome declared it would run a 2.4 percent deficit for at least three years.
Mr Junker warned the proposal is in breach of the EU’s tough rule implemented on Italy and threatens the Eurozone’s existence.
Mr Salvini accused EU officials of driving Italian borrowing costs up of Italian borrowing costs.
He said Brussels has created fears for investors and enlarged the gap between Italian and German borrowing costs.
“The words and threats of Juncker and other European bureaucrats continue to make the spread rise, with the aim of attacking the government and the Italian economy. We are ready to ask damages from those who wish Italy ill,” Mr Salvini said.
The comments come after Mr Juncker expressed concern Italy could suffer a debt crisis similar to Greece.
He said: “Italy is distancing itself from the budgetary targets we have jointly agreed at EU level. I would not wish that, after having really been able to cope with the Greek crisis, we’ll end up in the same crisis in Italy.”
Mr Salvini responded: “No one in Italy is taken in by Juncker’s threats.”
He insisted criticism of the budget “will not stop us”.
While the budget’s 2.4 percent deficit matches the EU’s 3 percent limit, promises to end austerity means the figure could rise, which goes against the bloc’s rules.
Coalition partner Five Star Movement leader Luigi Di Maio said Italy has intention of backtracking because of threats.
He said: “We are not turning back from that 2.4% target, that has to be clear. We will not backtrack by a millimetre.”