The purpose of chemotherapy tube placement is to facilitate the infusion of chemotherapy drugs, protect the peripheral veins and reduce the irritation of chemotherapy drugs on blood vessels. The so-called chemotherapy buried tube is the meaning of deep vein placement before chemotherapy drugs are injected into the body. Generally, chemotherapy drugs are injected into the body through deep vein placement, which can significantly reduce phlebitis caused by chemotherapy drug infusion through superficial veins, or drug extravasation resulting in damage to peripheral vascular tissues, and thus reduce the patient’s pain. It should be noted that catheterization is a kind of traumatic operation, which may cause anxiety, tension and other emotions of the patients, and after catheterization, the activity of local limbs is limited, and too much activity may lead to dislodgement of the catheter, or local limb swelling, venous thrombosis and other complications, so pay attention to the activity of the catheterization cautiously, and do the maintenance of the DVT catheter on a regular basis.