The independence of Queensland's public service is at risk under a Palaszczuk government policy that seeks to encourage union membership, the opposition says.

The policy, which instructs public servants to actively co-operate in union activity and the recruitment of new members, shows the government's priorities are in the wrong place, LNP leader Lawrence Springborg said on Monday.

"Public servants should be focused on delivering for Queenslanders, not delivering membership for unions," he said.

The Queensland Government Commitment to Union Encouragement policy was posted on the Department of Premier and Cabinet website last week.

It acknowledges delegates' role within the workplace, grants them paid education leave to study industrial relations and encourages the establishment of union and employer committees, among other measures.

But Treasurer Curtis Pitt denies it is a sign the union movement is usurping power in Queensland.

"This policy is simply a return to the previous policy that was in place since the year 2000," he told ABC radio on Monday.

© AAP 2015