Working ladder assembly for overall maintenance of airplane

A working ladder assembly for overall maintenance of an aircraft comprises a radome maintenance working ladder, a cabin maintenance working ladder, a rear fuselage maintenance working ladder and a vertical fin maintenance working ladder which are sequentially arranged from front to back and are each composed of two parts which are arranged in a bilateral symmetry mode. The left part and the right part of the radome maintenance working ladder are connected into a whole through a quick clamp; the left part and the right part of the cabin maintenance working ladder are each provided with an upper platform and a lower platform, the lower platform of the cabin maintenance working ladder is in butt joint with the radome maintenance working ladder, and the upper platform of the cabin maintenance working ladder is in butt joint with the rear fuselage maintenance working ladder; the left part and the right part of the rear fuselage maintenance working ladder are respectively provided with a rear fuselage maintenance w