Rain sewage runoff recycling ecological management device

The invention relates to the field of ecological management, and discloses a rainwater and sewage runoff recycling ecological management device which comprises a buffer channel, and an ecological planting mechanism used for rainwater and sewage flow buffering is installed at the upper end of the buffer channel; a collecting mechanism for separating sludge from water is mounted in the buffer channel, the collecting mechanism comprises two mesh cylinders, and the two mesh cylinders are rotationally arranged in the buffer channel; large-particle-size floaters are collected and separated from small-particle-size floaters in the rotating process of the mesh cylinder, the large-particle-size floaters can be subsequently composted to serve as supplementary fertilizer of farmland, a leaf inlet is blocked by an opening and closing plate in the process that the opening and closing plate rotates to make contact with the supporting plate, and the large-particle-size floaters in the mesh cylinder cannot be discharged from the leaf inlet; only small-particle-size floating objects in the mesh cylinder penetrate through the mesh cylinder, fall down and are discharged, and after the opening and closing plate rotates to be separated from the supporting plate, the leaf inlet is opened, and large-particle-size floating objects enter the mesh cylinder to be stored and separated from the small-particle-size floating objects.