Secondary tumors of the stomach are not common. There is no systematic and comprehensive research on the clinical characteristics, diagnosis and treatment of metastatic breast cancer. This patient underwent radical mastectomy for breast lobular carcinoma 8 years ago. Recently, bilateral ovarian metastasis was found; the metastasis of breast cancer was considered, but the immunophenotype was different from that of the primary breast tumor. After ovarian tumor surgery, metastatic carcinoma in the stomach was found to be in accordance with the immunophenotype of the primary breast tumor. The patient had a complex family history of tumor, and gene detection did not detect the pathogenic mutation of BRAC1, BRAC2 and other gene embryo lines. It is still necessary to analyze and summarize a large number of case datas to provide a scientific treatment for patients with digestive tract metastasis of breast cancer.