A broken root canal needle may interfere with root canal therapy. Root canals are mainly able to deal with conditions such as dental caries or pulpitis, which can kill the nerve and avoid the symptoms of toothache. During root canal treatment, a broken needle may affect the treatment and may even cause inflammation of the apical tissues, so it needs to be removed in time. Root canal needle breakage is associated with improper quality of instruments, reuse of instruments, corrosion of instruments, as well as excessive intraoperative force, excessive narrowing or bending of the root of the tooth. When this happens, it can be removed under a microscope with a special instrument for removing broken pins, and if it is difficult to remove it, then plasticizing treatment or surgical treatment is considered. It is recommended that root canal treatment should be carried out in a regular tertiary hospital stomatology department to ensure a certain degree of safety, and any discomfort should be treated in a timely manner.