Businessman and Federal MP Clive Palmer has followed through on his threat to sue Queensland Deputy Premier Jeff Seeney.

Documents have been filed in the Supreme Court, seeking about $1.1 million in damages for defamation.

Mr Seeney says Mr Palmer sought preferential treatment for his coal mining projects in 2012, and sent documents to the Crime and Misconduct Commission for consideration.

Mr Palmer has denied the claims.

He is already suing Premier Campbell Newman for defamation.

Last week, Mr Palmer said he had documents disproving Mr Seeney's claims that he tried to corruptly influence Queensland Government decisions.

Mr Palmer said his evidence showed Mr Seeney had made inconsistent and false claims about their dealings.

Speaking to the ABC on June 6, Mr Seeney said Mr Palmer sought favourable treatment in April 2012 for his coal company in Queensland's Galilee Basin.

Mr Seeney said Mr Palmer talked about the support he had given the LNP at that meeting.

"And the fact that he had a lot more money to give in the future," Mr Seeney said.

"He wanted special treatment. He wanted us - our Government - to act inappropriately, to make decisions.

"I believe it would have been corrupt."