It is not necessary to inject tetanus when the finger is cut by a kitchen knife. There are some cases that do not need tetanus injection and some cases that need tetanus injection. 1. No need for tetanus injection: If the surface of the chopper is clean and the wound where the finger is cut is relatively shallow, an anaerobic environment will not be formed, resulting in the propagation of tetanus bacilli, so simple disinfection and bandaging can be carried out at this time. After cleaning the wound, disinfect it with iodine povidone acetonitrile and bandage it with a band-aid, and disinfect it and change the band-aid on a regular basis. In this case, tetanus injection is usually not needed. 2. Need tetanus injection: If the surface of the chopper is rusty or dirty, and the wound is deeper, an anaerobic environment will be formed, which will easily lead to a large number of tetanus bacilli multiplying, and may lead to tetanus infection. Therefore, this situation usually need to inject tetanus, and clean bandage, regular dressing change treatment, taking amoxicillin, cefaclor and other antibiotics to prevent infection. If a patient’s finger is cut by a kitchen knife, it is recommended to go to the hospital for standardized treatment in order to avoid delaying the condition.