Filtering device and water purifier using same

The utility model discloses a filtering device which comprises a waterway board main body, and the waterway board main body is provided with a first filter element runner module communicated with a first-stage filter element, a second filter element runner module communicated with a second-stage filter element, a third filter element runner module communicated with a third-stage filter element and a fourth filter element runner module communicated with a fourth-stage filter element, the first filter element flow channel module, the second filter element flow channel module, the third filter element flow channel module and the fourth filter element flow channel module are sequentially communicated to form a filtering waterway, the utility model further discloses a water purifier, the water purifier comprises a filtering device and a heating device, one part of pure water filtered by the filtering device is output at normal temperature, and the other part of the pure water is output after being heated by the he