A Queensland police officer has been suspended from service for allegedly assaulting a child while on duty and turning off his body camera during the interaction.

The Queensland Police Service (QPS) said the 40-year-old male officer was being investigated over the incident, which allegedly saw him use inappropriate, offensive and threatening language while speaking to the juvenile.

"In keeping with our commitment to high standards of behaviour, transparency and accountability, we have undertaken to inform the public when an officer faces serious allegations of misconduct," a QPS statement read.

"This does not mean that the allegations against the officer have been substantiated."

The officer was suspended with full pay.

QPS said the constable was from the Northern Region, which covers an area from Townsville, west to Birdsville, and north to the Torres Strait.