Filtering type centrifugal pump siphon device for sewage

The utility model discloses a filtering type centrifugal pump siphon device for sewage, which belongs to the technical field of sewage treatment and comprises a siphon tank and a centrifugal pump, the siphon tank is connected with a water outlet pipe, and the other end of the water outlet pipe is connected with the centrifugal pump through a flexible connecting pipe; a first ball valve is arranged on the water outlet pipe; a filter screen is arranged in the siphon tank, and the filter screen is of an L-shaped structure; the inner cavity of the siphon tank is divided into a filtering area and a water purifying area by the filter screen, a water inlet pipe is connected to the filtering area, and a check valve is arranged on the water inlet pipe; impurities in sewage can be filtered, and abrasion of the centrifugal pump is reduced; the deformation of the siphon tank caused by excessive negative pressure can be avoided; the backflow phenomenon can be avoided; hard deviation, caused by vibration, between the centr