Rubber dam, also known as rubber sluice gate, is a high-strength synthetic fiber fabric for the force skeleton, inside and outside the rubber coating as a protective layer, processed into a rubber sheet, and then anchored to the bottom plate into a closed dam bag, through the water (gas) to inflate the drainage pipeline to form a bag-type water retaining dam. The top of the dam can be overflowed and the height of the dam can be adjusted according to the need to control the upstream water level, in order to play the benefits of irrigation, power generation, shipping, flood control, tide and so on.