Metastases from breast cancer are usually lymph node metastases and hematogenous metastases. The most common forms of lymph node metastasis are axillary and internal breast lymph nodes, followed by supraclavicular and contralateral lymph node metastasis. Whether the distant metastasis is through bloodstream or not is related to the size of the primary tumor, the number of lymph node metastasis and the pathological grade. The common sites of metastasis are lung and pleura, followed by bone, liver, brain and adrenal gland. The methods to prevent tumor recurrence include: risk assessment of recurrence; perfect treatment; forming a favorable diet structure, low-fat diet, more vegetables and fruits; establishing a healthy lifestyle and a good positive attitude, adjusting the rhythm of life, keeping a relaxed mood, actively participating in physical exercise, reducing psychological tension factors, and maintaining a calm state of mind.