Invasive lung adenocarcinoma needs chemotherapy according to the condition after diagnosis. Lung adenocarcinoma is a common pathological type of lung cancer, which is most common in women and is caused by heredity, gene mutation and other factors. One of the main treatments after diagnosis is chemotherapy, which uses blood to make chemotherapy drugs reach the lesions and kill tumor cells. Neoadjuvant chemotherapy, adjuvant chemotherapy and palliative chemotherapy can be used according to the condition, and chemotherapy can be used in early, middle and late stages, which should be analyzed according to the condition. Commonly used chemotherapeutic drugs, such as paclitaxel, cisplatin, carboplatin, etc., can often be combined with radiotherapy, targeted therapy and other therapies for common treatment. Drugs need to be used under the guidance of a doctor, it is recommended that patients choose the appropriate treatment method under the guidance of a doctor, and actively treat the disease to avoid delays.