Adjustable assembly type protective cage ladder stand used for foundation pit engineering

The utility model provides an adjustable assembly type protective cage ladder stand used for foundation pit engineering, which comprises stand column structures arranged in parallel, each stand column structure adopts an assembly type assembly structure, each stand column structure comprises a plurality of independent standard section stand columns, and the adjacent standard section stand columns are fixedly connected through gusset plates matched with connecting bolts; steps for climbing are fixed between the stand column structures. An annular protection cage is arranged on the periphery of one side of the stand column structure; a plurality of wall connecting pieces are arranged on the outer wall of the stand column structure and located on the opposite side of the annular protection cage. The crawling ladder is of an assembly type structure and can be assembled according to the depth of a foundation pit, so that the crawling ladder adapts to foundation pits with different depths; after foundation pit cons