Queensland horse trainer Ben Currie has been banned from racing for four years after an investigation into text messages where he allegedly said he intended to use an illegal electric shock device.

The Queensland Racing Integrity Commission found the Toowoomba-based trainer guilty on Friday of "engaging in an improper action".

The breaches relate to the horses Massive Attack in 2015 and Said Written in 2016, when Mr Currie was their trainer.

Stewards allegedly found text messages where Mr Currie discussed his intention to use an illegal jigger, an electric shock device, which was capable of affecting the two horses' performance.

On Friday, the QRIC disqualified Mr Currie for two years for each offence.

Mr Currie has until May 17 to give his horses to other trainers.