Water-saving purification device

The utility model relates to the technical field of water purification equipment, in particular to a water-saving purification device which comprises a tap water tank, a drinking water tank, a first booster pump, a second booster pump, a liquid level sensor and a filter assembly, the first booster pump is fixedly installed on the top face of the tap water tank, and the first booster pump pumps tap water into the tap water tank; the second pressure pump is communicated with the tap water tank and the filter assembly, the filter assembly is communicated with the drinking water tank, and the liquid level sensor is fixedly installed in the drinking water tank. The tap water and the drinking water are separately stored, the tap water is pumped into the tap water tank for storage by the first pressure pump, and the water in the tap water tank is pumped into the drinking water tank for storage by the second pressure pump, so that the influence of too high or too low pressure of the pressure pumps on the filtering ef