The widespread popularity of digital technology has brought about significant changes in the treatment of mental health problems. Traditional mental health services can no longer meet the needs of society for mental health, and digital mental health services are developing vigorously. Digital mental health services have shown significant advantages in rapid diagnosis, improving mental health, and improving mental service efficiency. This article outlines the development and application of mental health services so far. On the basis of describing the various uses of digital psychological intervention measures, it focuses on the ethical issues faced by the current application of digital mental health services, such as privacy and data security caused by Big data, potential ethical risks caused by digital technology, insufficient clinical verification, imperfect market regulations and professional threats to psychological workers. To ensure the rational and compliant use of digital technology in the field of mental health, this article discusses the ethical problem- solving directions of current digital mental health services from three levels: technical policies, ethical norms and systems, and social individuals, in order to promote the integration of digital technology and mental health services and improve the quality and efficiency of digital mental health services.