A man has towed a flaming trailer down the Bruce Highway for 20 kilometres leaving a trail of burning debris.

The trailer, which was being towed by a ute, did not have tyres.

Police said officers spotted the blaze near Miriam Vale at 3:00am on January 18.

Despite turning on their lights and sirens, police allege the man kept driving with his fiery load.

The burning debris caused a number of spot fires in nearby bushland.

A 49-year old man from Kybong is assisting police with their investigation.