Solid-liquid pre-separation device for sewage treatment

The invention discloses a solid-liquid pre-separation device for sewage treatment, and relates to the technical field of sewage treatment. The device comprises a box body. A water distribution cavityand two filtering cavities which are of hollow circular structures are formed in the box body. A water purification cavity of an annular structure is further formed in the box body. A water diversionrunner and a compression cavity are further formed in the box body. The bottom surface of the water distribution cavity is respectively communicated with the two filtering cavities through the water diversion runner. A flow control valve is fixedly arranged at the water diversion runner. Through the design of the flow control valve, the device can carry out solid-liquid separation treatment on sewage in a quantitative manner, and the problem that a filter screen is easily blocked in a traditional flood irrigation mode is solved. Through the matching design of spiral conveying blades and filtering holes, the device not