Objective To determine the incidence and the influencing factors of sleep disorders in breast cancer (BC) patients through a systematic evaluation. Methods Articles reporting the influencing factors of sleep disorders in BC patients published before December 2023 were searched in comprehensive databases, such as China National Knowledge Infrastructure (CNKI), Wanfang, VIP, sinomed, PubMed, Web of Science, Cochrane Library, Embase, EBSCO. The eligible data were evaluated using the Agency for Healthcare Research and Quality (AHRQ) and Newcastle-Ottawa scale (NOS). Results Twenty papers representing a total of 4409 cases sample size and 29 influencing factors were included. The results of the systematic evaluation showed that the detection rate of sleep disorders in BC patients was 67%, the main influencing factors were chemotherapy, age, surgery, tumour classification, depression, anxiety, pain, fatigue, and exercise frequency, the secondary influencing factors were radiotherapy, genetics, income, family status, hormone levels, hot flushes, coping styles, environmental changes, and quality of life, and the other influencing factors included ethnicity, number of hospitalisations, physiological function, place of residence, constitutional type, hyperlipidaemia, religious beliefs, previous respiratory disease, self-image, social support and form of medical insurance payment. Conclusion The prevalence of sleep disorders in BC patients is high, and healthcare professionals can identify high-risk factors and intervene early for reducing the risk of sleep disorders in BC patients.