Abstract: This study was designed to record, analyze, and feed back the data of experimental and control groups in pretest and posttest, and conducted five group sandplay interventions on college students with low self-satisfaction. The results showed that as the intervention progressed, sandplay works with the trauma themes decreased, those of healing themes increased, and the sandplay production gradually showed a phenomenon of “convergence” and “integration”. Before intervention, the experimental group’s scores of self-concept test were significantly lower than those of the control group. After five rounds of interventions, the difference of all factors became little between the experimental group and the control group. The experimental group showed a significant improvement in self-concept test, which indicated effective function of group sandplay intervention on the formation of college students’positive self-concept, and the improvement of their self-satisfaction and mental health levels. The mechanism of group sandbox intervention is to use nonverbal communication and symbolic meaning to act on the unconscious level, thereby improving the self-concept and satisfaction level of low self-identity and low self-satisfaction college students.