Water-saving type water purifier

The invention discloses a water-saving type water purifier. The water-saving type water purifier comprises a first filter housing, a second filter housing, a third filter housing and a fourth filter housing which are sequentially connected in series, wherein a first filter element is arranged in the first filter housing, a second filter element is arranged in the second filter housing, a third filter element is arranged in the third filter housing and a fourth filter element is arranged in the fourth filter housing; the water inlet of the first filter housing is communicated with a water source; the fourth filter element is a reverse osmosis filter element; a first water outlet and a second water outlet are formed in the water outflow end of the fourth filter housing; the first water outlet in the water outflow end of the fourth filter housing is connected with a purified water storage tank through a purified water branch, and the second water outlet in the water outflow end of the fourth filter housing is connected with a concentrated water storage tank through a concentrated water branch; the purified water storage tank and the concentrated water storage tank are in pipeline communication with different water outlets of a water faucet respectively. The water-saving type water purifier disclosed by the invention has the advantages that the efficient utilization of concentrated water is realized, the structure is simple, the utilization rate of water resource is high and the water-saving and energy-saving effects are good.