A registered nurse left psychologically devastated after she was repeatedly mistreated by her boss has won more than $1.4 million in a negligence lawsuit against the Queensland government.

Mary-Rose Robinson argued she was unfairly blamed, humiliated, belittled and undermined for months by Cape York Health Service district chief executive Susan Turner.

The far north Queensland nurse was awarded $1.4 million. Credit:Joe Armao

Ms Robinson consequently suffered a chronic mental health disorder and had to leave her job as district director of nursing in January 2011.

She has been unable to work since and was forced to medically retire in May 2014.