Yesterday, a 60-year-old lung cancer patient with adenocarcinoma of the middle lobe of the lung, 5*7 cm in size, with liver and multiple bone metastases, was treated under CT guidance using argon helium knife, and the pain was obvious because the tumor directly destroyed the adjacent ribs. Under local anesthesia, the patient was positioned by CT and 5 argon helium knives were inserted. After 1 hour of time, the operation was finished and the CT was reviewed and the whole ice ball basically covered the whole tumor tissue, including the rib destruction. Ar-He knife is an effective treatment for tumors, including lung cancer, liver cancer, etc. It is suitable for patients who cannot operate due to physical and other reasons, or whose tumors cannot be removed, which can minimize the tumor load and achieve the purpose of doing surgery without surgery, and is an effective, safe and less painful treatment for malignant tumors. It is an effective, safe and less painful treatment for malignant tumors, including metastatic bone tumors with severe pain.