Reserved hole anti-leakage treatment process and wall-penetrating cantilever scaffold profile steel

The invention provides a reserved hole anti-leakage treatment process and wall-penetrating cantilever scaffold profile steel, and belongs to the technical field of building construction. The reserved hole anti-leakage treatment process comprises the following steps that the wall-penetrating cantilever scaffold profile steel is pre-buried in a reserved hole, and a prefabricated concrete block is manufactured according to the shape and size of the reserved hole; and after a wall-penetrating cantilever scaffold is dismantled, the wall-penetrating cantilever scaffold profile steel is dismantled, the prefabricated concrete block is placed into the reserved hole to be blocked, a gap between the prefabricated concrete block and the inner side of an original structure is filled with waterproof mortar, and a gap in the outer side is blocked with a foaming agent. According to the anti-leakage process, the anti-leakage requirement of an outer wall can be met, the problems of labor and time waste are solved to a great ex