Safety authorities are again pushing for quad bike laws.

SafeWork NSW says it may be time to mandate the use of helmets on quad bikes, following the death of another child on the weekend.

Two children under the age of 10 have been killed riding quad bikes in the last two months.

Statistics show 109 people were killed on quad bikes from 2011 to 2016.

SafeWork says half of those deaths happened during recreational use of the bikes, with 40 per cent of the death being the result of severe head trauma.

The safety agency says this shows the need for better safety measures.

Quad bikes have “very quickly has become the number one cause of fatality and injury on farms right across Australia,” SafeWork NSW group director Tony Williams told reporters.

Police are yet to confirm whether or not the children involved in the weekend’s accident had helmets.

SafeWork NSW says farms can be a tricky place to regulate safely.

“They are quite unique places,” Mr Williams said.

“[They are] not only a workplace but a place of residence, they do require a specialist area of consideration [and] at the end of the day, they can be dangerous places.”

One step SafeWork proposes is to stop marketing quad bikes as all-terrain vehicles.

“We've had a number of coroners make that observation — that they really are far from [being] all-terrain vehicles,” Mr Williams said.

“They are quite susceptible to rollover [and] really not suitable to hilly environments or high speed operations.”

WorkSafe NSW offers free quad bike training courses, support for switching to other vehicles, and even assistance retrofitting safety measures to existing bikes.

“We want to turn the statistics around but we need the support of the farming community,” Mr Williams said.

“We are seeing too much repetition in the way people are being seriously injured or killed.”