Nearly 2,000 people joined the rally in Perth yesterday to protest against the Federal Government's proposed resource super profits tax.

David Flanagan of Atlas Iron, who spearheaded the rally, said dozens of mining companies and their employees are opposing against the the tax reform.

However, Prime Minister Kevin Rudd vows to implement his tax reform and continues on with his consultations with concerned mining leaders.

Mr. Rudd is under scrutiny by mining leaders as he is pressed to revise or “water down” his tax proposal and appeals to change the definition of a “super profit.”

Mr. Flanagan told media yesterday that the Prime Minister must engage with the mining industry.

"This is not big mining that is down there today - AMEC represents 170 small mining companies that employ between five and 25 people each," he said.

"We employ a lot of working families and we're not being listened to. So, this is our best chance of getting our voice heard."

He also added that the tax will affect all Australians.

Mr. Rudd told a local radio yesterday that consultations will continue but it might be difficult for both sides.

Meanwhile, Minerals Council chief executive Mitch Hooke said that talks between the Government and WA miners will be productive. He added that the proposed tax has also damaged investor sentiments as it may push investors to place their projects in other nations instead.