With the development of medicine, lung cancer treatment methods are not limited to surgery, radiotherapy and chemotherapy, etc. As a new type of minimally invasive targeted treatment technology, argon helium knife can make up for the shortage of surgery and radiotherapy while effectively treating lung cancer. How does Ar-He knife treat lung cancer? Lung cancer surgical treatment can be divided into complete curative surgery and palliative surgery, but because surgical treatment has great limitations, patients need to meet the conditions of good physical condition and no other diseases. For early stage lung cancer patients with small tumor and single lesion, surgery can be considered. For patients with middle and advanced stage lung cancer, surgical treatment is risky. Ar-He knife is not a real scalpel, but a hollow stainless steel needle. “When argon gas is released rapidly in the tip of the needle, it can freeze the diseased tissues to -120℃~-165℃ in ten seconds; when helium gas is released rapidly in the tip of the needle, it will produce rapid rewarming and warming, which will quickly thaw the ice ball and eliminate the tumor. Ar-He knife can effectively treat not only lung cancer, but also patients with various types and periods of malignant solid tumors. This is because argon helium knife treatment of tumors is relatively undemanding and usually well tolerated by patients. For patients with advanced cancer, argon helium knife treatment can effectively reduce the tumor load.