ALL-AUTOMATIC WATER-SAVING FLUSHING DEVICE

The utility model relates to a water-saving cistern, a spring (1) which is made of corrosion prevention materials or is treated in a corrosion prevention mode is added in the cistern in the prior art; the spring (1) is arranged on a ball valve suspender (4) between a rubber ball valve (5) and a ball valve baffle (3); when a pull rope (6) is pulled, the spring (1) is compressed by the rubber ball valve (5) and the ball valve baffle (3) to release water flow; when the pull rope (6) is loosened, the rubber ball valve is sprang to the original position to cut off the water flow to achieve the purpose of water saving. According to the measurement, more than 50% water can be saved by the water-saving cistern.