Military deployment is an important factor for mental health of deployed military service members. Military deployment operations have increased greatly in recent years, so it is urgent to carry out psychological research. We reviewed status quo of post-traumatic stress disorder and other mental disorders that military deployment members suffered. Furtherly, we sorted out and summarized common psychological health interventions such as psychological screening, psychotherapy and training, and social support in military deployment. In addition, we also discussed the research directions of future military deployment including improving research methods, identifying individual differential targets for post-traumatic stress disorder, localization and militarization of related treatment technologies, and developing psychological training methods for military deployment personnel. We hope this paper can give the policymakers, researchers and those involved in military deployment information for decision-making, psychological assistant work and subsequent psychological research.