There is a warning that more children will die because of child abuse unless New Zealanders change their "mind their own business" approach to the problem.

It is 10 years this week since Rotorua three-year-old Nia Glassie died, following brutal and systemic abuse by her caregivers.

The Glassie case put child abuse on the national agenda, but it has not stopped other children from facing a similar fate.

A child is killed from abuse every five weeks in New Zealand. That makes it the second highest rate in the developed world.

The anniversary comes weeks before the start of an inquest into the death of Taupo toddler Moko Rangitoheriri two years ago, also following caregiver abuse.

Child advocate and Child Matters chief executive Jane Searle said New Zealand needs to shed its "she'll be right" attitude of non-intervention.

She said we have a responsibility to protect children who might not be able to speak up for themselves.

If you have a hunch, it is incredibly important you get advice or that you report whatever it is that you are observing, Ms Searle said.