An Australian comedian who joked about chopping off Prime Minister Scott Morrison's head says it's hypocritical of Twitter to ban her while not taking action against the men who sent her "serious" death-threats on a regular basis.

Becky Lucas, who appeared on the pilot of Sam Dastyari's panel show Disgrace on Network Ten, fired off a tweet a few weeks ago joking about how she was going to "chop off" Scott Morrison's head. As a result, Twitter suspended her account.

Lucas challenged the decision, arguing it was simply a joke and she needed social media access to promote upcoming shows. However, on Thursday Twitter informed her it wouldn't be restoring her account.

"After investigating your appeal, we have determined that your account posted content that was threatening and/or promoting violence," the tech giant said in an email.