Background Psychological interventions, in particular those derived from cognitive-behavioural therapy (CBT) frameworks and Eye Movement Desensitisation and Reprocessing (EMDR), are effective for reducing posttraumatic stress disorder (PTSD) symptoms and associated distress. However studies to date have tended to exclude people who have psychosis; a clinical population who are known to be at risk of experiencing trauma. Whether people with psychosis also benefit from trauma-focused psychological therapies (TFPT) warrants further investigation. Method A systematic search for randomised controlled trials (RCTs) was undertaken. Data were synthesised using narrative and meta-analytical approaches. Results Five studies met the review inclusion criteria. Study findings overall, indicate that TFPI are clinically effective for reducing intrusive thoughts and images, negative thoughts and beliefs associated with traumatic memories, hypervigilance, and avoidance. Limited data were available about the utility of interventions for improving mood, anxiety and quality of life. Attrition rates were comparable for participants offered active and control conditions; the number of adverse events reported was low. Conclusion Findings are consistent with those reported for non-psychosis populations. Further studies should establish which intervention modalities glean more favourable outcomes, and are more acceptable for this clinical population