There may not be the best treatment method for lung mucinous adenocarcinoma, and surgery, radiotherapy, chemotherapy, targeted therapy, immunotherapy and other corresponding methods should be adopted according to specific conditions. 1. Surgery: the degree of malignancy of lung mucinous adenocarcinoma is relatively higher, if localized cancer is found, surgery is needed to remove the diseased tissues as early as possible, and the scope of resection may be enlarged and the surrounding lymph nodes may be cleared if necessary. 2. Radiotherapy and chemotherapy: regular radiotherapy and chemotherapy are needed after surgery, and the common drugs used in chemotherapy include paclitaxel, cisplatin and so on. 3. Targeted therapy: Targeted drugs such as gefitinib and erlotinib can kill cancer cells with corresponding mutated gene targets and cause relatively little damage to normal cells, but genetic testing is needed to clarify whether there is any indication before use. 4. Immunotherapy: it can enhance the body’s anti-tumor immune ability, and commonly used drugs include pembrolizumab and so on. After the discovery of mucinous adenocarcinoma of the lung, it is necessary to carry out regular treatment under the guidance of doctors, and at the same time, it is also necessary to strengthen the nutrition and maintain a good state of mind, which will be helpful for the recovery of the disease.