The invention discloses a multifunctional water saver. The multifunctional water saver comprises a washing basin, a filtering device and a water storage tank positioned below the washing basin, wherein a water tap is arranged above the washing basin; a filtering device water inlet and a filtering device water outlet are formed on the filtering device; a recycled water inlet communicated with the filtering device water inlet is formed at the bottom of the washing basin; the filtering device water outlet is communicated with the water storage tank; and a filtered water outlet communicated with a toilet water tank is formed at the bottom of the water storage tank. The multifunctional water saver has the advantages that: 1, the device is simple, is convenient to install and can be popularizedand applied to occasions, such as households, schools, institutions and the like; 2, a water pump is not arranged, but the water pressure is increased by an opening increasing method, so that the normal use is guaranteed, the water resource is saved, the electrical energy is saved, noise pollution is avoided, and the water saver is suitable for use; and 3, the filtering device adopts a double filtration mode, the filtration effect is good, the filtering device can be directly cleaned by clear water of the water tap, and the filtering device also can be completely drawn out and is convenient to clean.