Split type filtering system and filtering method thereof

The invention discloses a split type filtering system and a filtering method thereof, and aims to solve the technical problems that in the prior art, a filter screen is easy to block, time-consuming and labor-consuming to clean, and troublesome to overhaul and replace. The system comprises a filter screen body and a pipeline, wherein the upper portion of the filter screen body is provided with a barrel-shaped screen plate, the lower portion of the filter screen body is provided with a hemispherical opening, the upper portion of the pipeline is connected with a horn-mouth-shaped matching base, and the matching base is matched with the hemispherical opening. The filtering method comprises the following steps: (1) after a medium to be treated is filtered by the barrel-shaped screen plate, the medium enters the pipeline from the hemispherical opening and the matching base; and (2) the pipeline is communicated with a water inlet of a water pump, and the filtered medium enters the water pump through the pipeline an