The age of 12–19 is the transition period of adolescents’ psychological and physiological maturity from childhood, during which they are prone to psychological problems such as anxiety and even non-suicidal self-injury (NSSI). According to official data, China's youth suicide rate is the highest in the world, and this grim situation makes us realise that it is crucial to pay attention to and solve the problem of adolescent mental health. Currently, there is no sound intervention system for self-inflicted suicides (attempted suicides) caused by adolescent mental health disorders. How to intervene and reduce the risk of NSSI among adolescents in a more effective and palliative way is a question we need to think about. This paper through the questionnaire and interviews to obtain self-injurious adolescent psychological profile and psychological needs, according to which the guiding principles of product design. At the same time, the study found that compared with the social support given by people, the ‘social’ support given by pets has some advantages. Therefore, this paper adopts the bionic form of the healing robot and wearable equipment for non-sensory detection, objective and active recording of behavioural and psychological data information and analysis to give a scientific healing plan, and through the interaction of the terminal APP to guide the self-injured teenagers to heal, accept themselves and the world, and to achieve psychological healing for self-injured teenagers to help.