The invention discloses a water purifier. The water purifier comprises a water inlet path, a filtering device, a water purification and storage device, a water outlet path, a flushing loop and a control device, wherein the water inlet path is used for introducing tap water; the filtering device is connected with the water inlet path for filtering the tap water to form purified water; the water purification and storage device is connected with the filtering device for storing the purified water; the water outlet path is connected with the water purification and storage device for enabling users to obtain the purified water; the flushing loop is connected with the water inlet path and the water outlet path; and the control device is used for controlling the purified water in the water purification and storage device to pass through the water outlet path, the flushing loop and the water inlet path to flush the filtering device when the water purification and storage device has water and the water intaking time interval of the users is more than the set time, and thus, the purified water is used for flushing and soaking the filtering device, the purified water has few impurities, and soluble ions on the surface of the filtering device can be dissolved; and besides, a problem of high solid content (Total Dissolved Solids) dissolved in first glass of water can be solved.