Queensland drivers caught using their mobile phone behind the wheel more than twice in 12 months will be slugged double demerit points and face a $353 fine.

The laws that came into effect today will see learner drivers or P-platers lose their licence altogether for repeat phone offences.

The new rules are part of the State Government's crackdown on road safety.

Acting Assistant Police Commissioner Dale Pointon said mobile phone use is a leading cause of deaths on the state's roads.

"It only takes a moment to cause an accident and a crash and the consequences can be severe," he said.

"The person who's doing it always thinks they're fine, it's everyone else around them who notices they're not fine, [that] they're all over the road."

He warned drivers police would not be showing any leniency.

"Any use of a mobile phone at all whether it be talking, texting ... so it's absolutely essential that you have a strategy not to use a mobile phone in your motor vehicle when you're driving," he said.

"That includes when at traffic lights, or when you're parked somewhere, but not properly parked."

The tough new measures have been applauded by the RACQ's Steve Spalding.

"It is dangerous and irresponsible to use a phone while you are driving, and enough is enough, it can't continue," he said.

"There's no question that using a phone is linked to serious crashes.

"If the driver's not looking where they're going then they've just got no chance of keeping that car safely on the road."