Safety door mechanism installed on lift car and used for hoistway rescue

The invention relates to the related technical field of lift shaft rescue, and discloses a safety door mechanism for shaft rescue mounted on a lift car, which comprises a plurality of lift car upright posts mounted in a shaft and two lift car bodies arranged in the lift car upright posts in an up-down sliding manner, first supports are arranged at the bottoms of the sides, close to each other, of the two lift car bodies correspondingly. The safety doors are arranged on the opposite sides of the adjacent elevators, the mounting frames combined with the vertical beams of the car frame are arranged on the hoistway sides of the safety doors, and a stable evacuation channel is formed through the arrangement of the first supports, the second supports and the pedals in the gap bridge assembly; meanwhile, the length-adjustable handrail located between the mounting frame and the stand column is transversely fixed to the upper portion of the pedal, a safe evacuation channel is formed between the handrail and the pedal,