Dozens of low-paid Chinese workers on a large state government project have not received any wages for more than two months, in the latest case of foreign worker mistreatment in Australia.

The Chinese plasterers and carpenters have worked for weeks on the $630 million Bendigo Hospital project without pay after Melbourne-based fit-out subcontractor Asset Interiors collapsed and went into administration.

Chinese workers protesting out the front of Lend Lease in Docklands over unpaid wages. Credit:Simon O'Dwyer

The affected employees, more than 50 in total, are mainly Chinese migrants and are understood to be on a variety of visas.

A Fairfax Media investigation last October uncovered extensive exploitation of Chinese workers in Australia. It surveyed more than 1000 jobs advertised on Mandarin-language websites, including many construction jobs, and found a widespread "black economy" with 80 per cent paying illegally low rates.