The proposed site for a new juvenile jail in Melbourne's west is set to be moved by the Andrews government, following a massive backlash from Werribee locals to its planned location.

The Age revealed in January that a new high-security youth justice centre would be built in Werribee South following a string of violent uprisings at juvenile jails at Malmsbury and Parkville.

Protesters at last month's rally in Werribee. Credit:Wayne Taylor

Soon after the announcement, thousands rallied in Werribee's main street against the Werribee South plan, which would have seen the new jail built within hundreds of metres of homes, farms and school sports ovals.

Protesters at last month's meeting arrived in a convoy of tractors, and particularly targeted their local member Tim Pallas, referring to the planned jail as "Tim's Palace". Mr Pallas won 66 per cent of the vote at the 2014 election in the ultra-safe Labor seat.