Queensland Attorney-General Jarrod Bleijie says preparations have been finalised for a boot camp for young offenders near Cairns in the state's far north.

Local magistrates now have the option of sentencing juveniles to the camps rather than sending them to detention centres.

Twenty young people will go through the program over the two-year trial, which involves one month at a residential facility followed by mentoring and community work.

A facility at Kuranda, west of Cairns, has been bought to house the young people for part of the program.

Attorney-General Jarrod Bleijie says the young offenders will be mentored and take part in physical activities, before returning to their communities to complete the program.

"It's on the verge of starting - we've got a bunch of kids on these pre-sentence orders at the moment so they're awaiting sentence," he said.

"In the next few weeks children will start coming through those pre-sentence orders and hopefully we can divert children out of the detention centres and put them into these programs - the boot camp program."

Meanwhile, the Member for Cairns, Gavin King, has told Parliament he supports moves to toughen up laws for juvenile offenders.

Mr King says the arrest of four boys, aged between 12 and 17, on 54 offences last weekend shows existing laws are not working.

"Police are at their wit's end," he said.

"They arrest these kids one week, they're out on the streets a week later and they're arrested for a similar offence yet again because breach of bail is currently not a criminal offence.

"I fully support the Attorney-General's moves in this regard and I urge the community of Cairns to get involved in this review of the Youth Justice Act."