Introduction: Although suicide is a public health issue, preventive and welcoming actions are still little used, however, psychosocial support is essential in situations of self-harm and suicidal behavior. Objectives: The present study aims to present a study on psychological support in cases of suicidal behavior and LAI (intentional self-harm). Method: this is a systematic, descriptive literature review. The Scientific Electronic Library Online (SCIELO), Electronic Journals of Psychology (PEPSIC), LILACS and PubMed databases were used, based on the inclusion criteria: articles related to the topic, with a time limit of 5 years. Discussion: it was observed that psychological support is extremely necessary in cases of LAI, including suicidal behavior, not only for the attempter, but also for the family, who experience and deal with difficult moments like these. Final considerations: It is necessary to use universal, selective and indicated intervention strategies, recommended by governmental and non-governmental organizations as activities that aim to prevent and/or reduce the number of cases of self-harm and suicidal behavior.