The utility model relates to the technical field of mine-used lifesaving cabins, in particular to a lifesaving cabin sealing door which is simple and reasonable in structure, a multi-point squeezing locking mode is used, sealing is reliable, labor is saved, and operation is easy. According to the technical scheme, a sealing strip is arranged on the edge of a door body, an operation hand wheel is arranged at the center position of the door body, the operation hand wheel squeezes and locks the door body by driving a locking mechanism which mainly comprises a driving rod, connecting rods and locking crank shafts, a plurality of locking crank shafts are movably arranged on the inner side edge, in partitioning contact with a lifesaving cabin, of the door body, one ends of the locking crank shafts on the same side of the door body are connected together through one connecting rod, the center of the driving rod is fixed on a wheel shaft of the operation hand wheel, limiting grooves are formed in the two ends of the driving rod, a sliding pin shaft is arranged in each connecting rod, and each sliding pin shaft is clamped in the corresponding limiting grooves in the two ends of the driving rod. The lifesaving cabin sealing door is mainly used in a lifesaving cabin door.