Pauline Hanson has called on the government to 'tighten up' immigration laws after a new report revealed 50,000 migrants who were denied asylum in Australia remain in the country. 

The One Nation leader slammed the current lengthy appeals process that is being blamed for the backlog, saying migrants should not be allowed to apply for asylum online.

Then they are giving a bridging visa, they're entitled to work like any other Australian.

'A lot of ones that are applying in Malaysia - that's the biggest country that we have mostly visa holders -  there was nearly 2,000 in January alone that are over staying. 

'They come here as tourists and apply to stay in the country as asylum seekers. Most of them don't get to stay. About 90 per cent are denied the right to stay in Australia.'