Device for filtering sundries at sewer water inlet

In order to solve the problem of sewer blockage, the utility model provides a device for filtering sundries at a water inlet of a sewer for multiple times. The device is mainly composed of three parts, a surface layer filtering cover plate is arranged on the uppermost layer of a sewer water inlet and fixed to a clamping groove in the surface of the sewer water inlet through a nut, filtering holesof the cover plate are large, and the effect of blocking large-size sundries can be achieved while the water draining capacity of the cover plate is guaranteed; the bottom-layer inclined filter screencan be directly placed on the clamping groove below the surface-layer cover plate, the size of the filter screen is small, and impurities falling from the filter holes of the cover plate can be filtered for the second time; due to the inclined arrangement of the filter screen, intercepted impurities can move and accumulate at the bottom of the filter screen, so that the filter holes can be prevented from being covered, an