Water stop belt structure for deformation joint and construction method

The invention relates to the technical field of underground waterproof engineering, in particular to a waterstop structure for a deformation joint and a construction method. The water stop belt structure comprises a side formwork and a middle partition belt. The side formwork comprises a fitting plate, an outer edge plate and a middle embedded plate, the outer edge plate and the middle embedded plate are located at the two ends of the fitting plate respectively, and a barb is arranged on the first side face of the fitting plate; the side formworks are symmetrically arranged, a gap is formed between the side formworks, the multiple middle separation belts are arranged in the gap between the side formworks, the two ends of each middle separation belt are connected to the second side faces of the attaching plates on the two sides respectively, and a set gap is formed between every two adjacent middle separation belts. The waterstop structure is convenient to install, more stable, longer in service life and good