Malignant tumors metastasized to the lungs are mainly treated with three types of therapy: surgery, chemotherapy and radiotherapy, and some patients may choose targeted drugs and immunotherapy. The choice of treatment plan needs to be decided by the specialist according to the primary tumor condition, type, location and number of lung metastases, and patient status. 1. Surgery: for patients who can control the primary tumor, can completely remove all the metastatic lesions, and have no metastases from other parts outside the chest and can tolerate surgery, such as soft tissue sarcoma. 2. For lung metastasis, the effect is limited, and it can play the effect of palliative treatment. Chemotherapy can be chosen with the same chemotherapy program as that of the primary tumor, and the commonly used drugs are paclitaxel, cisplatin, and so on. 3. Radiotherapy: radiotherapy is more sensitive to Wilms’ tumor, Ewing’s sarcoma and germ cell metastatic lung cancer, and it can be used for lung cancer with metastasis in both lungs or one side of lung. 4. Others: For patients with mutations in some specific molecular targets, they can choose corresponding targeted therapeutic drugs or immunotherapeutic drugs under the guidance of doctors, which can well reduce the damage to normal tissues. For example, patients with sensitive mutations in the EGFR gene can choose gefitinib, erlotinib, etc.; patients with gene amplification in the HER-2 gene can choose trastuzumab, patuximab, etc. Malignant tumors metastasized to the lungs, it is recommended to go to the hospital in time for a clear diagnosis and treatment, so as not to delay the condition.