Movable boarding ladder for dry bulk cargo wharf

The utility model provides a movable boarding ladder for a dry bulk cargo wharf. The movable boarding ladder particularly relates to a chassis truck, a variable-amplitude oil cylinder, a sliding groove, a sliding block, a plug pin device, a lifting oil cylinder, an inner door frame, an outer door frame, a guide frame, an inner channel, an outer channel, a telescopic oil cylinder, a working platform, an overturning inclined ladder and the like. According to the utility model, the ship receiving function in a large height range can be realized in a vertical lifting manner; the flexible response to the state change of the ship deck is realized in the forms of horizontal stretching and overturning adjustment; and meanwhile, the overall height of the boarding ladder with the large connecting height in a non-working state is controlled in a sliding amplitude variation mode. By the adoption of the device, operation can be carried out in a narrow space in the front edge of a wharf, and flexible transition between tre