PICC is one of the channels for chemotherapy infusion, and the two cannot be judged as good or bad directly. Chemotherapy channels include ordinary hard needle infusion set, peripheral venous needle, PICC, etc. Each chemotherapy channel has its own characteristics, and the one that suits the patient is the best. 1. Ordinary hard needle infusion set: it is the usual infusion set, which can be used as and when needed, but the extravasation of chemotherapeutic drugs may cause tissue necrosis, and the long-term application may lead to peripheral phlebitis, which is a safety hazard, so it is not used basically. 2. Peripheral venous needle: it is a method to puncture the peripheral vein with the needle core and cannula together, then pull out the needle core and leave the outer cannula in the peripheral vein for infusion, which is convenient and simple to operate, and it can be retained for 3-5 days, and it can reduce the damage and discomfort caused by repeated puncture, but it can not avoid the stimulation of the peripheral vein by the chemotherapeutic drugs, and the long-term application of the drug may lead to phlebitis. 3.PICC: It refers to central venous catheterization through peripheral vein puncture, which means one end of the longer catheter is sent to the central vein from peripheral vein puncture, and the other end is left near the peripheral vein puncture point, which can be used to infuse fluids in the late stage, and the drugs enter the central vein directly through the catheter to avoid phlebitis effectively, and can be kept for about half a year, but it needs to be changed regularly in the hospital. So PICC is one of the chemotherapy channels for chemotherapy infusion, each chemotherapy channel has its own characteristics, and what is suitable for the patient is the best, so it is recommended that patients choose the suitable chemotherapy channel for themselves under the recommendation and guidance of specialized doctors.