Staircase slope adding device and adding method of staircase slope adding device

The invention discloses a staircase slope adding device, which comprises n railings and a control valve connecting rod, wherein each railing comprises a base, a support frame, a fixing device, a connecting rod, a slope plate and a control valve; each slope plate is a parallelogram plate parallel to the plane of the support frame; an included angle formed by the bottom edge of each slope plate relative to the base is the inclination degree of the staircase; the slope plates of the adjacent railings form a whole or are respectively independent; the control valve is used for controlling the connecting rods to be in vertical or horizontal placement relative to the base; and the control valve connecting rod is connected with the control valve of each railing. The staircase slope adding device has the beneficial effects that the staircase slope adding device can be easily added to the existing staircase; at ordinary times, the connecting rods and the slope plates are all vertically leaned beside the support frame and do not occupy the space of the staircase; when people need to push bicycles or motorcycles upstairs, a switch is pressed down, so that the connecting rods are flatly released; the slope plates are laid on the staircase steps; a slope path is laid and formed on the staircase by the integral slope plate or the slope plates of a plurality of railings; and the bicycles or the motorcycles can be conveniently pushed upstairs.