Victoria's Transport Minister says V/Line will work quickly to start rail freight lines operating again after a weekend derailment near Ouyen.

A freight train came off the tracks on Saturday morning in a nature reserve at Bronzewing.

The transportation of food exports in north-western Victoria has been delayed while V/Line works towards lifting the mostly empty container wagons off the rail line.

Transport Minister Terry Mulder says 300 metres of damaged track at Bronzewing will be repaired and 400 sleepers will be replaced.

But the transport company Wakefield says the state government needs to do more to upgrade the freight system.

The company's managing director, Ken Wakefield, says it is not the first time a train has derailed this year and the problem will worsen during summer.

"The speed will get lower and the restrictions will become more onerous and it makes it more difficult to operate," he said.

"So yes I am concerned that we're in the middle of winter and we're having derailments.

"I get really concerned if Government doesn't take the steps appropriate to ensure that we can get this cargo to market."

He says other companies that can supply these markets.

"We need to have an efficient and reliable rail freight network in Victoria," he said.

"Now I'm not saying that it is the track in this particular circumstance but if there's been no maintenance since 2009 it sort of leans that way."

The Government has confirmed it last rehabilitated the line in 2009 and that V/Line regularly inspects the tracks.

Mr Mulder says the Coalition understands the Mildura rail line is critical for exporting local produce.