In terms of actual engineering design and application, the water stop is generally a belt rubber body with a central hole, and a number of water proofing lines are evenly arranged on both sides of the central hole. These waterproof lines are closely combined with the concrete when pouring concrete, which extend the water infiltration line, and adapt to the elasticity of the rubber itself and the deformation of the central hole The expansion and deformation of concrete belongs to the structural water stop material, while the water swelling waterstop is generally water swelling type, that is, at the construction joint, it is placed at the joint of the concrete before the pouring of the post pouring concrete. In this way, if water enters the construction joint in the later stage, the material will expand with water, thus filling the whole gap, so as to achieve the effect of water stop, which belongs to the functional type Water materials