Liquid filtering device

The utility model discloses a liquid filtering device which comprises a first pipeline, a second pipeline, a guide plate and a filter screen, the first pipeline is provided with a fluid inlet and an impurity discharge port, the guide plate is arranged in the first pipeline and extends along the length direction of the first pipeline, the second pipeline is communicated with the first pipeline, and the filter screen is arranged on the second pipeline. The fluid enters the first pipeline from the fluid inlet and is divided into a fluid lower part and a fluid upper part by the flow guide plate, the fluid lower part flows to the impurity discharging opening, and the fluid upper part flows to the second pipeline. Large-particle impurities in the fluid can be located on the lower portion of the fluid due to the gravity of the large-particle impurities, the large-particle impurities flow to the impurity discharging opening, and the upper portion of the fluid flows to the second pipeline and is filtered through the f