Opposition Leader Daniel Andrews made the announcement on Saturday aiming to "put officers back on the frontline" instead of having them monitor prisoners at police stations.

Details of the plan would be finalised early next year, but would be funded over four years and include up to 400 new custody officers. The custody officers would be unarmed and have their own uniform.

An Ombudsman's Report released in March this year showed prisoners had consistently been in police cells for more than the maximum allowed time of 14 consecutive days.

There can be up to 18 prisoners kept at Bendigo Police Station at any one time.

Bending crime rates remained steady from June 2013 to June 2014, decreasing by 0.2 per cent with more than 7500 crimes committed. Drug offences increased by 103 per cent in that time, to more than 530.

Member for Bendigo East Jacinta Allan said police currently "aren't getting the support they need to do their job".

"Under the Liberals, our local cops are forced to waste time and resources doing someone else's job," she said.

In December last year, there were 357 prisoners detained in police cells. The number is capped at 150.

However, Victorian Minister for Police and Emergency Services Kim Wells said there were 59 prisoners kept in Victorian police cells on Friday.

He said the number was now "consistently below 100 a day".

"We have opened more than 1900 new prison beds in this term of government with another 2100 in the pipeline," Mr Wells said.

He said the government had trained 1800 extra police officers, surpassing its promised 1700.