At present, arterial interventional chemotherapy has a place in the treatment of lung cancer with definite efficacy. The blood supplying artery often mentioned in interventional chemotherapy is difficult for many patients and family members to understand, so I will use a few pictures to introduce what is the blood supplying vessel of lung cancer. The so-called blood supplying vessels are the vessels that supply nutrition to the tumor. Since tumors need a lot of nutrition to grow, the blood vessels of tumors are thicker and more disorganized than the normal ones. In interventional chemotherapy, the interventionalist has to find this blood vessel and then perfuse chemotherapy or embolize it to achieve the purpose of treatment. This is an angiographic mutation of peripheral type lung cancer, and the black mass-shaped one in the picture is the tumor vessel. This is a picture of central type lung cancer with tumor blood supplying arteries in the shape of clusters, and the tumor blood vessels are disorganized. It is through these blood vessels that the tumor absorbs a lot of nutrients from the body and thus grows rapidly. Only when we know it correctly, we can treat the tumor in a targeted way.