A quick countercurrent-type water purifier configured with two filters, two motors, a control circuit, a purified water storage tank and a waste water tank, wherein a pipe extends from the waste water tank. Moreover, a raw water inlet pipe connects to the pipe through one of the motors that thereon forces water through branch pipes into water inlets at bottoms of the two filters. A pipe branches out from each of the two water inlets, and connects to the waste water tank. A flowmeter is configured at a water outlet at a top portion of each of the filters. An electromagnetic valve subject to control by control circuit is configured at each of the water inlets and the water outlets of the two filters, thereby achieving quick reverse washing of contaminants from filter cores of the filters and providing large quantities of purified water for industrial usage.