Construction method for flexible connection of outer window auxiliary frame and concrete base wall

The invention relates to building construction, in particular to a construction method for flexible connection of an outer window auxiliary frame and a concrete base wall. Comprising the following steps: A, cleaning a wall window; b, the outer window auxiliary frame is arranged in the wall window; c, the connecting part of the outer window auxiliary frame is fixedly connected with the inner wall of the wall window; d, a gap between the outer window auxiliary frame and the inner wall of the wall window is filled with a sealing strip with an S-shaped section, and the two sides of the sealing strip are filled with flexible materials; e, an outer side protective film is attached to the internal corner of the outdoor side of the outer window auxiliary frame; and F, an inner side protective film is attached to the internal corner of the indoor side of the outer window auxiliary frame. The external window construction quality is improved, the quality risks of cracks and leakage are avoided, the one-time acceptance q