Disclosed is a folding tent capable of being unfolded and folded rapidly, comprising leg tubes and an tent ejector rod part, wherein one end of the tent ejector rod part is hinged to an upper connecting disk, the other end of the tent ejector rod part is hinged to an upper portion of the leg tube; the tent ejector rod part comprises at least two ejector rod units hinged to each other, each ejector rod unit hinged to the upper connecting disk is provided with a supporting rod in a fitting manner, and the other end of the supporting rod is hinged to a lower connecting disk; a connecting rod is further arranged between at least one supporting rod and the ejector rod unit installed on the supporting rod in a fitting manner, and one end of the connecting rod is used to be in hinge fit with the ejector rod unit. A hinge joint is located at a position between a hinge joint of the supporting rod and the ejector rod unit and the upper connecting disk, and the other end of the connecting rod is in hinge fit with a sliding part; the sliding part slides along the supporting rod, and the sliding part is locked by a locking mechanism when the folding tent is fully unfolded.