In order to prevent damage to this nerve, the thyroid surgery community has now reached a consensus that the nerve should be searched for and dissected during surgery. The laryngeal recurrent nerve search methods are divided into two categories: the outward inward search method; the inward outward search method. First, from the outside to the inside search method: for the classic method. (1) Inferior thyroid pole searching method: This method is the classic searching method and the most used method in surgery. The advantages of this method are: the anatomical landmarks are clear, usually along the inferior thyroid artery, and most of the recurrent laryngeal nerves are closely related to the ipsilateral parathyroid gland, which is favorable to protect the blood flow of the parathyroid gland on that side and reduce postoperative complications. Disadvantages: The subthyroid artery and vein at this site have the greatest variability with the recurrent laryngeal nerve, and the vessels are often reticulated, and there is a high rate of adipose tissue, lymph nodes, and fascial tissue, and the fascial gap is narrow, so once the injury to the vessels causes bleeding, the recurrent laryngeal nerve is easily damaged during hemostasis. (2) Recurrent laryngeal nerve into the larynx: The location of the recurrent laryngeal nerve into the larynx is mostly located on the lateral side of the inferior edge of the cricothyroid muscle, and it is divided into two branches with a constant location, accompanied by the subglottic artery and a close relationship with the posterior tegmentum of the thyroid gland. The advantages of this method are: small variation of the retrograde laryngeal nerve, constant anatomical position, easy to reveal in case of dealing with the superior pole of the thyroid gland, and the only way to find the retrograde laryngeal nerve in case of its absence. Disadvantages: the inferior laryngeal artery is easily damaged, the nerve is easily damaged during hemostasis, and the gap between the posterior thyroid peritoneum and the recurrent laryngeal nerve is extremely small, so the nerve is easily damaged by inexperienced surgeons. (3) Search method at the middle thyroid vein: this is a small variation of the recurrent laryngeal nerve, with a spacious fascial space, loose tissue, and few blood vessels. Advantages of this method: less bleeding during the search, clear surgical field of view, and generally no damage to the nerve. Disadvantages: fewer anatomical landmarks, greater blindness in the search, and relatively longer search time. For resection of the thyroid gland without central zone clearance, the parathyroid gland and blood flow can be protected in situ by searching from the inside out. The operator can find the laryngeal nerve at the junction of the thyroid gland lobe and trachea and resect the thyroid gland along the surgical peritoneum of the thyroid gland with adequate protection of the posterior regurgitant nerve. There is a greater advantage for the parathyroid gland to ensure in situ blood flow. The anatomy of the recurrent laryngeal nerve is well understood in the chest. The above methods should be used flexibly and interspersed according to the situation in order to effectively reduce the damage to the recurrent laryngeal nerve and improve the protection of the parathyroid glands.