Chemotherapy refers to chemical drug therapy, for which the treatment process is one of the common treatments for patients with malignant tumors. Chemotherapy can be divided into radical chemotherapy, palliative chemotherapy, and neoadjuvant and adjuvant chemotherapy depending on the effect of treatment. Some patients can be cured radically after chemotherapy such as choriocarcinoma, lymphoma, and seminoma, etc. Neoadjuvant chemotherapy refers to chemotherapy performed before surgery, and adjuvant chemotherapy is postoperative chemotherapy. Chemotherapy mainly includes intravenous chemotherapy or oral chemotherapy, which is generally used to kill tumor cells and achieve the purpose of anti-tumor through chemotherapeutic drugs. After chemotherapy, patients need to review the blood routine, liver and kidney function regularly to enhance symptomatic treatment.