The utility model relates to a water-saving type water purifier. The water-saving type water purifier comprises a tap water inlet end, a hollow fiber pipe, a water flow sensor, a tap water outlet end, a solenoid valve, a pump, a water storage tank, a liquid-level controller and a system controller, wherein one end of the hollow fiber pipe is connected with a tap water inlet pipe; the other end of the hollow fiber pipe is connected with the water flow sensor and is connected with a tap water outlet pipe; the pure water flows through the solenoid valve from a pure water outlet of the hollow fiber pipe, is connected with a pump and then is connected with the water storage tank; and the pure water is pumped by the pump and fed into a pure water faucet from the water storage tank. The water-saving type water purifier is characterized in that the water quality requirement and the water quantity requirement of drinking water and other household water can be met at the same time, and the waste of water resources caused by draining concentrated water to the outside is avoided.