The Australian Chamber of Commerce and Industry has stood down its chief economist over allegations he posted wildly offensive comments on his Facebook account, including one referring to a childhood picture of Treasurer Joe Hockey as "a fat little bastard".

Burchell Wilson, who has developed important elements of the ACCI's economic agenda and has become a vociferous public opponent of the renewable energy target since he joined the organisation in 2009, was stood down on Thursday by the group's chief executive, Kate Carnell, after the alleged postings surfaced.

Joe Hockey in Parliament on Wednesday. Credit:Andrew Meares

They include rants against the disabled, refugees, Muslims and Mr Hockey.

"Today I have been made aware of a number of offensive, derogatory and completely unacceptable Facebook posts allegedly made by ACCI chief economist Burchell Wilson," Ms Carnell said. "After learning of the matter, I spoke to Mr Wilson and directed him to stand down from his position pending a thorough investigation.