Fuente: WIPO "circular economy" The invention discloses an energy-saving water separation device. The energy-saving water separation device comprises a filtering storage box, a feeding hopper, a screening and conveying device, a fishing device, an annular diverting groove, a transporting and conveying device, a slag discharging opening, a screening body and a booster pump, wherein the screening body is a container filled with water, the feeding hopper, the screening and conveying device and the transporting and conveying device are sequentially arranged in the screening body according to the operation sequence of water separation; the feeding hopper is positioned above the starting end of the screening and conveying device, the transporting and conveying device is obliquely arranged, the lower end of the transporting andconveying device is positioned below the terminal end of the screening and conveying device, and the top of the transporting and conveying device is the discharging end; the annular diverting grooveis formed above the screening and conveying device, the annular diverting grooves takes the feeding hopper as the starting point to form a cycle, a section of groove body is arranged parallel to the screening and conveying device, the feeding hopper is taken as the starting point to be provided with the fishing device, and the fishing range is not less than the conveying range of the screening andconveying device; and the booster pump is arranged at the starting point of the annular diverting groove, and the filtering storage box is movably arranged at the part, close to the end point, of theannular diverting groove.