Left ear occlusion surgery is relatively mature and reliable, with relatively little risk; any surgery carries a certain degree of risk, which can be minimized by perfect preoperative examination and preparation. If the procedure is not performed properly, cardiac bleeding and air embolism may occur. Left ear occlusion is mainly used to treat conditions such as atrial fibrillation, which carries a high risk of stroke. The decision to perform the procedure requires rigorous evaluation and testing to determine that there are indications for the procedure and no contraindications, and to ensure that the procedure is beneficial to the recovery of the disease before the decision is made to perform the procedure. The procedure is now relatively well established, and with the introduction of interventional procedures, the relative risks have been further reduced. Before and after the procedure, thorough examinations and monitoring are usually performed to prevent possible risks and improve safety. The physician is informed of the risks before the procedure, and if there are questions about the procedure, they can be raised at this time. During treatment, it is recommended to cooperate with the physician’s treatment plan.