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Moving staircase: it includes both sides of the inclined support frame and stairs, which is characterized in that: the oblique supporting frame is composed of a plurality of equal size hinge connecting rod mechanism are mutually hinged together, the hinge connecting rod mechanism comprises a transverse rod and a vertical rod, a vertical rod from top to bottom average layout with six holes, cross bar from left to right the average distribution with three holes, a vertical rod and the transverse rod on the hole distance equal; each hinge connecting rod mechanism on top of the cross bar, stair handrails, the lower transverse rod staircase pedal support frame, through the stairs pedal will be on both sides of the inclined supporting frame are combined into a whole. Through the hinge connecting rod mechanism combination, the staircase can stretch and contract, when not in use can be readily folded in the upper floor of the building of the handrail frame, does not occupy space.