Severe mental disorder （SMD） is a disease with high recurrence rate and high hospitalization rate. The social function of patients is damaged obviously， which brings heavy economic burden to the family and society. At present， drug therapy is still the first-line treatment for mental disorders， especially for patients with SMD in acute and maintenance periods. Poor compliance with medication will seriously affect the efficacy of treatment and the prognosis of the disease. SMD patients often have poor drug compliance due to the influence of disease symptoms and insight， monitoring methods， and the availability of medical resources. In recent years， with the development of digital technology， it is gradually applied to the field of drug compliance for chronic diseases. Compared with the traditional monitoring method， it is more accurate， efficient and convenient， which promotes the improvement of SMD patients' medication compliance. In this paper， the application of digital technology in the field of SMD patients' medication compliance is discussed in detail.