Breast cancer is the most common malignancy in women worldwide, and its incidence and mortality rate are among the highest in female cancers. Breast cancer patients often have sleep disorder due to a variety of factors, and sleep disorder is a prominent problem that plagues breast cancer patients, which not only affects the quality of life of patients, but also increases the risk of disease progression. Sleeping disorder is often not taken seriously in clinical work. The use of appropriate sleep assessment tools can help to identify the type, severity, and further to timely interven sleep disorders in this population. Sleep assessment tools can also reflect the effectiveness of interventions. So it is necessary to use sleep assessment tools to accurately evaluate patients with breast cancer sleep disorder, which can help patients with effective symptom control, and improve quality of life and prognosis. In this paper, the application of a variety of sleep assessment tools in breast cancer patients is reviewed, in order to help clinical medical staff rationally apply the assessment tools and timely and accurately assess the sleep disorder status of breast cancer patients.