The process of minimally invasive surgery for lung cancer includes preoperative preparation, insertion of auxiliary instruments, removal of cancerous tissue and postoperative wound dressing. 1. Preparation before surgical operation mainly involves the anesthesiologist applying anesthesia to the patient after the surgical operation, keeping the patient in a proper position, sterilizing the skin of the area to be operated and laying sterile towel sheets. 2. Insertion of auxiliary instruments, firstly, use scalpel to make several wounds on the chest wall of the patient’s operation area, and then insert auxiliary instruments into the chest cavity of the patient through the wounds. 3. Removal of cancerous tissue, through the instruments inserted into the chest cavity, complete removal of the patient’s tumor tissue and send it for pathological examination. 4. Wound dressing, dressing the wounds in the chest wall where the instruments are inserted and placing a chest drain.