Federal Liberals Andrew Hastie and James Paterson have been barred from visiting China over their criticism of the country's authoritarian regime.
The duo were to visit Beijing in December with Labor MP Matt Keogh as part of a study tour organised by China policy think tank China Matters.
But in a statement, the think tanks said the Chinese embassy had informed them "that at this time Mr Hastie and Senator Paterson are not welcome on a China Matters study tour to Beijing".
The think tank suggested publicity about the study tour was a contributing factor in China's decision
"It is most unfortunate that the names of the politicians who had accepted our invitation to join the study tour in December became public in advance," China Matters said on Friday.
"The media attention that ensued created an environment which was no longer conducive to our goal of facilitating low-key discussions and exchanging differing points of view behind closed doors."
Mr Hastie and Senator Paterson have denied leaking the information to the media.
The duo said they had "looked forward to learning from the Chinese people about their culture, history and perspective during this visit.
"We are disappointed that this opportunity for dialogue now won't occur," they said in a joint written statement.
"We are particularly disappointed that the apparent reason why we are not welcome in China at this time is our frankness about the Chinese Communist Party."
Mr Hastie was criticised in August for likening the global response to China's rise to the lack of preparedness in Europe for the growth of Nazi Germany.
The Western Australian backbencher, who chairs federal parliament's intelligence and security committee, drew a mixed reaction from his coalition colleagues and condemnation from Beijing at the time.
He has also used parliamentary privilege to speak out about Chinese influence in Australia and human rights abuses against Uighurs in Xinjiang province.
Meanwhile, Senator Paterson has spoken out about foreign influence risks at Australian universities and the escalating violence in Hong Kong, and says he will continue to do so.
"If that's the price for speaking out, for being honest with our constituents about our concerns about our relationship with China, then that's the price that I'm sure Andrew is willing to pay, and I'm willing to pay," he told the ABC on Friday night.
"Hong Kong is one of the most amazing places in the world and what is happening there is an absolute tragedy and I believe the Communist Party bears some responsibility for that."
Australian Associated Press