Foreign Affairs Minister Marise Payne says Australia is "ready" to support the Solomon Islands and regional security with other Pacific nations, amid China's growing influence.
A leaked draft security deal between the Solomon Islands and China showed Chinese ships would be based in the Pacific and have a navy base less than 2000 kilometres off Australia's coast.
Senator Payne told Question Time on Tuesday the government found it "particularly concerning" the Solomon Islands may be engaging in activity that could "undermine" the stability of the region.
"We believe the Pacific family ... is best placed to provide security assistance to the Solomon Islands and we stand ready to assist further if that is needed," she said.
"We have been explicitly and emphatically clear in relation to that."
Prime Minister Scott Morrison spoke with his New Zealand counterpart about the proposed security agreement between the Solomon Islands and China.
The proposed deal has triggered alarm bells about the potential militarisation of the Pacific.
Mr Morrison and New Zealand Prime Minister Jacinda Ardern on Tuesday discussed the deal and actions they believe could undermine the security and stability of the Pacific region.
Ms Ardern has expressed concerns, telling NZ radio she did not see a need for China to have a security presence in the Solomon Islands.
New Zealand Foreign Minister Nanaia Mahuta has travelled to Fiji to discuss the issue with Pacific leaders.
Solomon Islands Prime Minister Manasseh Sogavare says the backlash to his country's security negotiations with China was insulting, Reuters reports.
The prime minister told his parliament on Tuesday that a leaked security document with China was a draft and he would not give details on the content of any proposed deal.
"We have no intention ... of pitching into any geopolitical power struggle," he said, adding the Pacific island nation would not pick sides.
Mr Sogavare also said Solomon Islands had previously asked Australia to build a naval base and this was refused because Australia said it was inappropriate given its defence program with Papua New Guinea.
"We are not pressured in any way by our new friends and there is no intention whatsoever to ask China to build a military base in the Solomon Islands," he said.
Mr Sogavare said he had exchanged text messages with Mr Morrison on the matter and also had written him a letter on Tuesday morning.
Both Australia and New Zealand have confirmed their ongoing commitment to the Solomon Islands Assistance Force.
Opposition Leader Anthony Albanese says Australia must engage more with Pacific island leaders.
"We need to be in a position whereby Australia is playing a leading role along with our allies in the Pacific because I'm very concerned about this announcement that appears to have been made in the Solomons," he told ABC radio on Monday.
"The Pacific step-up needs to be more than a slogan. It needs to be backed up by action and respect for what our Pacific island neighbours are saying, for example, about climate change."
