Objective To explore the experience of adolescents with depression participating in mindfulness-based cognitive therapy (MBCT), and to provide a reference for the continuous optimization of the training program. Methods A phenomenological research approach was adopted.One-on-one semi-structured interviews were conducted with 14 adolescents with depression who had participated in a group-based MBCT intervention.Data were analyzed using Colaizzi′s descriptive phenomenological method. Results A total of 4 themes and 17 subthemes were identified: ambivalent feelings toward MBCT at the initial stage, the experience of accep-tance during the intervention, perceived effects of the intervention, and factors influencing the intervention experience. Conclusion Adolescents with depression gain a sense of acceptance during MBCT and demonstrate enhanced abilities in awareness and defusion of automatic thoughts, as well as attentional regulation.However, the intervention effects remain influenced by the intervention protocol and the real-world environment.Further optimization of the program and the establishment of a systematic support network integrating family and school are warranted.