Controversial coalition MP George Christensen has praised Philippines President Rodrigo Duterte's drug war while calling for a "round up" of all suspected drug traffickers and producers.

Posting a link to an article on his Facebook page about Mr Duterte's boast about having killed criminals himself while he was mayor of Davao, Mr Christensen wrote "A leader who personally sees off drug dealers? And the problem is?".

George Christensen says instead of criticising Rodrigo Duterte, the west might learn something from his hardline stance on drugs. Credit:Andrew Meares

He quickly clarified his comments, saying while he didn't personally support elected officials shooting people, he agreed with the Philippines crackdown on drugs and believed Australia could learn from the approach.

"The point is, if we are serious about curbing the blight of drugs, we need to step up the fight," Mr Christensen wrote, before advocating a "round up of all known and suspected traffickers and producers and some serious questioning and interrogation by police".