The invention discloses a device for salvaging suspended solids in sewage treatment, and relates to the technical field of sewage treatment suspended solid salvaging equipment. The device comprises aworking box, a first cavity, a second cavity, a stirring shaft, a compression spring, an extrusion plate, a connecting channel, a discharging channel, an auger, a crawler belt, a bidirectional motor,a coupler, a first gear, a mounting block, a rotating shaft, a second gear, a turntable, a fixed rod, a push rod, a support plate, a chute, a moving block, a filter plate, a third cavity, a slider, areset spring, acompression roller, a first switch, a fourth cavity, a floating block, a second switch, a servo motor, a filter cavity, a third through groove, a first filter screen, a rubber spring, asecond filter screen, a baffle, a contact and a warning lamp. Sewage on the surface of suspended solids is extruded back into the first cavity to be reused, the suspended solids are extruded and crushed, the treatment difficulty of the suspended solids is reduced, and when the suspended solids on the second filter screen is too many, the warning lamp automatically reminds personnel to conduct cleaning work.