NSW has become the first state in Australia to automatically ban anyone convicted of serious animal abuse to ever own or work with animals ever again.

The government bill introduced tougher penalties for animal cruelty and bestiality after two years of intense work by Animal Justice Part MP Emma Hurst.

"We have witnessed some chilling cases over the past two years where animal abusers have been allowed to continue to breed animals, work alongside animals and even buy animals after their convictions," she said in a statement.

"There have been far too many cases where the punishments simply do not match the crimes.

"Animal cruelty is hard to think and talk about- but it is happening."

The NSW legislation is unique in which the ban is for a lifetime and automatically imposed upon conviction and Hurst hopes other states will follow suit.