This study explored the self-identity development of children with non-suicidal self-injury behavior through a feminist-oriented group counseling program intervention. This study adopted an action research approach and included five participants from the sixth grade: four females and one male. The group met once a week for 40 minutes each time, for eight weeks. The group project involved doctrines of feminist counseling theory, including awareness, empowerment, narrative, and equality. Data were collected through the researcher’s reflections, observer’s notes, and interviews with the participants and with the participants’ teachers and parents. The researcher analyzed data and verified the analysis by using the triangulation method. This study’s findings are summarized as follows: 1. The narratives, equality, and supportive care that the feminist group counseling approach emphasizes provided the self-harm student participants the opportunities to tell and re-tell their life stories; disclosing their stories helped them connect to the other participants. 2. The group counseling intervention helped students aware of their social roles, transform their thoughts into a positive perspective, and enhance their capacities to change. 3. The common experience that the students shared during the group process helped reduce their loneliness, rethink their self-harm behaviors, and face their true selves openly. 4. Through the group process, students gained more awareness and confidence regarding their strengths in abilities, enhanced their sense of power, and fostered a strong sense of self-identity. 5. The action and change during the group process facilitated the students’ self-empowerment, enriched their self-identity and self-acceptance, and finally, helped them implement changes in everyday life.