Abstract: Mental health work is one of the important links in the ideological and political work of "Top Ten Education", and is an essential component of "cultivating morality and cultivating people" in universities. The "Three Complete Education", as a key principle for ideological and political work in universities, refers to the systematic construction of an education system from all faculty and staff, all processes and all aspects. From the this perspective, this article takes the "Sunshine Health Project for Postgraduate Students" mental health series education activities of Capital Medical University as an example to explore the feasibility of constructing postgraduate student mental health education with the core concept of "Three Complete Education". It provides theoretical reference and practical support for the application of "Three Complete Education" in mental health education of postgraduate students.

Key words: Three Complete Education, postgraduates, mental health education