A foldable tent includes a tent cloth, a plurality of support frame poles to support the tent cloth, and a tent top supporting device. The tent top supporting device includes a cover, a plurality of connection sleeves, and a plurality of inwardly concave recesses. The plurality of inwardly concave recesses is disposed at a peripheral side of the cover. Each recess includes a first side wall and a second side wall disposed on two sides of the recess, and an inner side wall adjacent a center of the cover. Each respective connection sleeve is flippably or rotatably disposed in a corresponding recess, and has one end connected to an end of a corresponding support frame pole. When the foldable tent is unfolded, a side wall of the other end of the corresponding connection sleeve comes into contact and matches with the inner side wall of the corresponding recess.