The utility model relates to an emergency lifting device for a check curtain of a seal box, which is used for production equipment of float glass. The emergency lifting device comprises an electric push rod (1) and a chain wheel shaft (2), wherein a double-row chain (1a) is connected onto the telescopic shaft of the electric push rod (1); the chain wheel shaft (2) is arranged on a seal box body; double-row chain wheels (2b) are connected to the two ends of the chain wheel shaft (2); a double-row chain wheel (2a) is connected into the middle of the chain wheel shaft (2); and the double-row chain wheels (2b) are respectively connected with a front single chain (2c) and a rear single chain (2d), which are connected with a hanging frame (8) under a lifting frame (6) through a front riding wheel (3a) and a rear riding wheel (4a) respectively. The emergency lifting device is characterized in that the check curtain can be lifted manually or can be quickly lifted through the hanging frame (8) driven by the electric push rod (1) in emergency, and the check curtain can fast recover to home position for operation after the emergency is over. The emergency lifting device has the advantages of convenience of use, safety and reliability.