Conclusions: the treatment of achalasia of the cardia by means of double balloon dilation is a advantage approach simple to operate with the advantage of a low rate of complication and non-operation.

Objective:To observe the medium-long-term curative effect of endoscopic balloon-dilating therapy for achalasia. To explore a kind of non-surgical method for achalasia.

Esophagectomy was the standard treatment in patients with achalasia and a markedly dilated or sigmoid-shaped esophagus, with Heller myotomy considered to be ineffective in such cases.