Domestic violence campaigner Rosie Batty has slammed Pauline Hanson over her inflammatory maiden speech, branding the senator's tirade against the family law system an example of victim-blaming.

The One Nation leader made headlines for her claim that Australia was being "swamped by Muslims". But she also railed against the "discriminatory, biased and unworkable" family law system, and accused mothers of making "frivolous claims" to get sole custody of their children.

Fathers were taking their own lives or murdering family members out of "sheer frustration" at the system, Senator Hanson claimed.

"Children have two parents and until we treat mums and dads with the same courtesy and rights, we will continue to see murders due to sheer frustration, depression and mental illness caused by their unworkable scheme," she said.