Solid-liquid separation treatment device for sewage treatment

The utility model belongs to the technical field of sewage filtration, and particularly relates to a solid-liquid separation treatment device for sewage treatment, which comprises an outer sleeve, a filter cup and an elastic rope, the outer sleeve comprises an outer pipe, an inner pipe and a closed ring, the inner pipe is positioned in the outer pipe, the inner pipe and the outer pipe are collinear in axis, and the filter cup is positioned in the outer pipe. The outer pipe and the inner pipe are fixedly connected through the sealing ring, the bottom of the inner pipe is fixedly connected with an extension pipe, and the top of the extension pipe is detachably connected with a connecting joint; the liquid pushes the filter cup to descend, the elastic rope elastically deforms, water pressure is generated in the filter cup and the annular space at the moment, liquid flowing is promoted, the filter cup is actively pressed, the bottom of the inner pipe scratches the inner side wall of the filter cup, meanwhile, slu