The utility model discloses a hanging ladder assembly. The hanging ladder assembly comprises a hanging rod component, a plurality of hanging ladders and a lock catch, wherein the hanging ladders are superposed and suspended on the hanging rod component; a fastener which is fixedly connected with the wall surface is respectively arranged on each of the hanging rod component and the lock catch; hanging structures matched with the hanging rod component to realize hanging the hanging ladders are arranged on tops of the hanging ladders; the lock catch comprises a stop lever and an insertion plate hinged on the stop lever; convex buttons are further arranged on the hanging ladders; the distance S between the convex buttons and a hanging structure is equal to the distance S' from the hanging rod component to the lock catch; the convex buttons can be locked in the insertion plate on the stop lever. By virtue of the way, a conventional thought that only one hanging ladder can be installed in one plane unit is expanded, so that hanging ladder installation is developed towards space in a three-dimensional manner; by virtue of improved design of the conventional hanging ladder main body and installed fixing pieces, the hanging ladders can be arranged in a double-layer superposed manner, so that limited space around a square cabin is sufficiently utilized.