Pressure storage two-stage flushing water saver

The utility model discloses a pressure storage two-stage flushing water saver, which provides a water flushing pipe line n a support base. Two elastic water bags, a big yield time-delay closing valve and a small yield time-delay closing valve are provided on the water flushing pipe line. A Y-shape pipe is connected to the big yield time-delay closing valve and the small yield time-delay closing valve; check valve is assembled inside the water flushing pipe line; water control valve is provided inside a water inlet passage; bent bar is connected to the valve stem of the water inlet control valve; two tension springs are connected to the bent bar; flexible shaft is connected to the other end of the two tension springs; the flexible shaft is arranged on a sensing bracketing which can contact respectively with the two elastic water bags. The utility model has the advantages that: the device has a large water flushing volume, and can select from a large and a small water flushing volumes, provides low water consumption and apparent water saving effect. Compared with present toilet water flushing box, the utility model can save water by more than percent 50.