cricopharyngeal achalasia refers to incomplete or non-open functional opening of the cricopharyngeal muscle, and after repeated swallowing of food, it still cannot pass through the cricopharyngeal muscle, remaining in the epiglottic valley and the piriform fossa, and even regurgitated into the nasal cavity . Neurogenic diseases, myogenic diseases and head and neck tumors are the common causes. Patients with chronic underfeeding lead to malnutrition, reduced quality of life, affecting the outcome of the disease. At present, the treatment measures for cricopharyngeal achalasia at home and abroad include balloon dilation technique, surgical incision, botulinum toxin injection. The dilation of the balloon is easy to cause mucosal edema and damage. Local infection, massive hemorrhage, local nerve injury and other complications often occur in cricopharyngotomy. Botulinum toxin injection relieves muscle spasms and is now widely used to treat dystonia. Common injection localization methods include CT, ultrasound, electromyography and endoscopy. Ultrasound-guided injection is a new technique of visualization, simple and non-radiation injection guidance, which can observe the injection process and drug injection position in real time. Fixation with a balloon can further improve the accuracy of the injection. In this study, botulinum toxin was injected into the cricopharyngeal muscle by ultrasound combined with balloon.