This research examines the accumulation of forms of violence and their impact on youth exposed to family violence (EFV). The assumptions are : 1- youth EFV experience more forms of violence, and more trauma symptoms than children not exposed to family violence ; 2- accumulation of violence in these young people’s lives has a moderating effect on the consequences of EFV. Statistical analyses were performed from secondary data collected in two Quebec studies on polyvictimization. The results show that youth EFV experience more forms of violence annually than non-exposed youth. In addition, their level of anxiety, anger, depression and posttraumatic stress disorder (PTSD) is greater. Furthermore, accumulation of violence has a moderating effect on the anger of children aged 2 to 11. These results highlight the importance of screening all forms of violence that may take place in the lives of these young. This holistic approach must also be included in research, since the accumulation of violence can have moderating effect on the symptoms of trauma being studied.