The invention discloses a life water secondary utilizing device, which comprises a washing device, a mixed water valve, a water bank, a water overflow tube, a floor drain, a water tube, a water valve, a inner water chamber, a closestool water bank, a toilet seat, and a bracket. Wherein, the height between the washing device and the toilet seat is used to arrange a water bank; the life water via said mixed water valve flows into the water bank; the upper of water bank has a overflow water tube connected to the floor drain, and the bottom has a water valve connected to the water tube; the water tube is connected to the inner water chamber through the side wall of toilet seat; and when lifting the water valve of water bank, the life water can directly wash the toilet seat without flowing through the closestool water bank; and the water valve can be controlled. |