Achalasia of cardia (AC) is a primary esophageal motility disorder. There is no unified expert consensus on diagnosis, treatment and follow-up of AC in China. Chinese Society of Digestive Endoscopology and Chinese Endoscopist Association organized domestic experts in relevant fields to formulate this consensus by referring to the latest research progress based on collective discussion and voting. This consensus included 17 recommendation statements for the diagnosis, treatment, follow-up and treatment in special population of AC.