Breast cancer is a common clinical gynecological tumor. According to the 2022 global cancer data statistics, breast cancer ranks second in terms of incidence among newly diagnosed cancer cases worldwide. Modern medicine often adopts surgical operation, chemotherapy, and other methods, which have certain efficacy but also many problems such as high drug resistance rates and significant adverse reactions. Chinese patent medicines exhibit extensive anticancer effects. The study found that Shenyi Capsule, Pingxiao Capsule, and Zhenqi Fuzheng Granules were widely used in the treatment of breast cancer, exerting therapeutic effects on breast cancer by inhibiting cell proliferation, invasion, and metastasis, suppressing angiogenesis, reversing cellular drug resistance, and inhibiting precancerous lesions. Meanwhile, the oral administration of Chinese patent medicines in combination with other traditional Chinese medicine (TCM) compounds, TCM decoctions, or modern medical treatments can improve patients' quality of life and reduce adverse reactions. Currently, there are numerous studies on the treatment of breast cancer with Chinese patent medicines, but a systematic summary is lacking. Therefore, this study conducted a systematic review of the mechanisms of action and clinical applications of Chinese patent medicines as adjuvant therapy for breast cancer, aiming to provide guidance for clinical medication.