The invention provides an
underground space communication reserved hole wall body later-stage hole communication construction method, an existing prefabricated wall body comprises a main body structure area and a reinforcing structure area, and a
water stop opening method is arranged on the
butt joint face of the existing prefabricated wall body, and the method comprises the steps that firstly, an automatic lock catch
water stop system is installed in the reinforcing structure area of the existing prefabricated wall body, and an automatic lock catch
water stop system is installed in the reinforcing structure area of the existing prefabricated wall body; a spherical rubber water stop belt is placed in the water stop opening; secondly, a to-be-built
basement soil body is excavated, and to-be-built
basement floors are sequentially constructed from bottom to top; 3, taking out the wall body of the hole, and arranging a vertical support at the same time; constructing a first reinforcing column on the left side of the hole; the reserved hole wall body and the existing prefabricated wall body are in
butt joint and locked; sequentially taking out each wall body unit, additionally arranging a vertical support, and arranging a second reinforcing column; and fourthly, the reinforcing structure area is constructed, the existing
basement floor, the existing prefabricated wall and the
basement floor to be built are connected, and the lintels, the first reinforcing columns and the second reinforcing columns form a complete communicating hole.