Two 'lollipop women' who guard a vital school crossing in a growing community just south of Perth have walked off the job to escape abuse from passing motorists.

On the first day back at school on Tuesday, Secret Harbour Primary School welcomed their students back for term four, but said they were upset to discover their crossing guards were not there.

Two 'lollipop women' in Secret Harbour have walked off the job.

Secret Harbour P&C President Emma Pearson said she was not surprised at the ongoing abuse the wardens have to deal with.

"Parents were ringing me this morning when there was no one at the crosswalk," Ms Pearson said.