Partial solid nodular shadows in the lower lobe of the left lung need to be reviewed regularly if they are benign, or surgically removed as early as possible if they are malignant. Partial solid nodular shadow in the lower lobe of the left lung is mainly based on the nature of the nodule to determine the treatment. Benign pulmonary nodules, if there are no symptoms and the nodule is small (<8mm), no treatment is needed for the time being, and regular review can be done to observe whether the nodule is enlarged or not. If they are accompanied by respiratory clinical symptoms, such as cough, sputum, chest pain, etc., anti-inflammatory, anti-tuberculosis and symptomatic treatment is needed. Some solid nodules in the lower lobe of the left lung may be malignant, which needs to be determined by combining the size of the nodule, imaging signs, and if necessary, lung puncture biopsy to clarify the nature of the nodule. If the nodule is malignant, surgery is needed, and may need to be combined with chemotherapy, radiotherapy and other comprehensive treatment.