The WA Greens say the Government must abandon its proposed stop and search laws in light of the case of Taser misuse in which an unarmed man was stunned 13 times.

The Aboriginal man was tasered by two policemen at the East Perth Watchhouse in 2008, while nine other officers watched.

Premier Colin Barnett says he believes police can be trusted to use the stop and search laws responsibly.

But Greens Leader Giz Watson says police should not be given any more powers.

"Stop and search laws overextend what is reasonable in terms of providing police with the powers to do their job," she said.

"If you combine the proposed new stop and search provisions with these matters to do with inappropriate use of Tasers by the police then you've got a very worrying situation arising.

"The last thing we want to do is to provide them with an opportunity to be asking people who are not suspected of anything to submit to searches."