Advanced water stop formwork structure for post-cast strip of basement exterior wall

The utility model is suitable for the technical field of basement exterior wall construction engineering, and provides a basement exterior wall post-cast strip advanced water stop formwork structure which comprises steel bars, a first supporting piece, a second supporting piece, an embedded part, a fast-easy closing-up net, a steel plate, a polyurethane waterproof coating layer and exterior wall concrete. The first supporting parts are welded to the steel bars and the embedded parts, the fast-easy closing-up nets are welded to the steel bars, the two fast-easy closing-up nets which are spaced from each other are arranged between every two adjacent embedded parts, a post-cast strip is formed between the two fast-easy closing-up nets, and the outer wall concrete is arranged on the left side and the right side of the post-cast strip. The inner sides of the first supporting piece, the steel bar embedded part and the embedded part are embedded in outer wall concrete, the inner sides of the two ends of each steel p