Boarding ladder

The boarding ladder comprises a ladder main frame, treading pipes, connecting rods, pin shafts, gaskets, pin shaft assemblies and bolt locks, and the ladder main frame is formed by welding two rectangular longitudinal beams and a plurality of round pipes; through holes are formed in the upper and lower ends of the longitudinal beams for mounting pedal pipes; bolt locks are welded to the lower ends of the longitudinal beams and used for being matched with vehicle body holes to fix the ladder; the upper end and the lower end of the ladder main frame are each provided with a pedal pipe, and the two ends of each pedal pipe are provided with threaded holes used for installing pin shafts. One end of the connecting rod is connected with the ladder main frame through a pin shaft, and the other end of the connecting rod is provided with a pin shaft assembly for being connected with a vehicle body; the pin shafts sequentially penetrate through the connecting rods, the gaskets and the ladder main frame and then are conn