Underground water supply filtering device

The utility model discloses an underground water supply filtering device. The underground water supply filtering device is characterized by structurally comprising a device housing provided with a sewage discharge pipe, a water inlet pipe and a drain pipe, wherein the device housing is provided with a first-level flow baffle, a second-level flow baffle, a third-level flow baffle and a last-level flow baffle. The filtering device disclosed by the utility model can be used for effectively eliminating the invasion of most dispersive solid granules or linear entanglements and the like to greatly reduce the failure of a reducing valve and improve the reliability and the safety of a water supply system, the filtering device is easy to manufacture, is low in cost and is capable of automatically filtering without affecting the flow and pressure of the water supply system, since the filtering device is arranged on a horizontal pipeline behind the outlet of a ground high-level reservoir, precipitates are convenient to check, clean and discharge, and the service life of the water quality filtering device is long.