The utility model discloses a rubber dam fills drainage device relates to the hydraulic engineering operation management field, including sump pit, water pump and pipeline, the pipeline include main line and valves, the main line begin to include backward in proper order filling valve and check valve from the water pump to finally pour into rubber dam dam bag into, the filling valve before set updischarge pipeline and blowoff valve, the check valve after set up overflow passage and overflow valve, overflow passage after set up turn on the water the pipeline with the valve turns on the water,filling valve, blowoff valve and overflow valve and the attached earth's surface of pipeline setting on be higher than dam bag, the piping shaft of valve setting below being less than dam bag that drain in. The utility model discloses utilize simple structure, just can accomplish the rubber dam and fill the drainage operation, and owing to self possess filter equipment, make whole device also nothigh to the requirement of quality of water, enable to be used in complicated environment.