Gastrointestinal duplication cyst is a rare congenital disease which can occur in any part of the digestive tract between the root of tongue and the anus, and it is commonly  seen in the ileum. About 45% of the gastrointestinal duplication cyst occurs in the ileocecus and the epityphlon. Multiple gastric duplication cyst is a rare type of the gastrointestinal duplication cyst, which accounted for 3.8%~5.0%. Gastric duplication cyst mostly occurs in the greater curvature of the stomach, and it connects with the stomach wall. Multiple gastric duplication cysts in the mediastina is rarely seen. In this article, the imaging presentations of 1 patient with multiple gastric duplication cysts inside the mediastina were analyzed.