Suspended Katter party member Bernard Gaynor says the party is on the verge of collapse amid a damaging rift over same sex marriage.
He claims Katter's Australian Party (KAP)founder Bob Katter is at odds with the party's president Max Menzel and national director Aidan McLindon on the issue.
Mr Gaynor says people are walking away from the party.
"There is a problem between the party president and Bob Katter and there is a problem between Aidan McLindon and Bob Katter," Mr Gaynor told ABC radio.
"It is also quite clear that Bob Katter and the party's values are going in two different directions."
He says the divisions on the issue could kill the party.
"If the wrong decisions are made it may well collapse," he said.
"Since the party has endorsed its first pro-gay marriage Senate candidate, within two days there has been call for the overthrow of management.
"The party is in disarray from top to bottom."
Mr Gaynor was disendorsed as a Senate nominee for KAP last month, after saying on Twitter that he wouldn't let gay teachers educate his children.
Another KAP candidate, Tess Corbett, withdrew her candidacy last month after telling a newspaper she didn't believe gay people should have the same rights as heterosexuals.
Earlier this month, it was reported that Mr Katter came to the rescue of a pro-gay marriage candidate, Steven Bailey, after he was asked to quit the party over his views on the issue.
Mr Bailey said Mr Katter had given him his support despite the party's national director, Mr McLindon, having asked him to withdraw his candidacy for one of the two Senate seats in the ACT.
Mr McLindon confirmed he'd asked Mr Bailey to resign, given "his position on marriage was in direct conflict" with the party's core values.
The party's website states: "Marriage is the union of a man and a woman, ideally for life. It is in the best interests of children that they are nurtured by their father and their mother and laws concerning children should be based on the best interests of children."
Mr McLindon said he made the call to Mr Bailey at the direction of the party president.
In May last year, Mr Katter used a forum at the Sydney Writers Festival to say he regretted his party had run homophobic advertisements during the Queensland election campaign.
Mr Katter declined to respond to Mr Gaynor's latest comments when contacted by AAP on Monday.