The utility model discloses a natural pond sediment natural pond liquid is handled and is used filter screen based on biogas fermentation device, including filtering long handle, auxiliary connectionpole, striding bow, connection spindle nose, scraper bowl, filtration tooth, interlock gear, outrigger shaft and stationary blade greatly. The beneficial effects of the utility model are that: this novel filtration net design is reasonable, the cost is suitable, functions are powerful, and firmness and durability are good, be applicable to the transportation and the filtration of multiple occasionand material, especially in the pit, the filtration work of moving of dell residue and half solid -state medium, unique bucket structure, the controlled filter pore size is come to angle according tothe scraper bowl is joined, help the work of solid -liquid medium separation, the extension filters long handle structure, make the device be applicable to in the pit, methane -generating pits etc. Are difficult to the occasion of large -scale operation, the action of simultaneously two scraper bowl symmetry, help stable in structure and alleviate the operation degree of difficulty. Simple structure, the maintenance is easy with the change accessory, and service life is long, and during operation stability is strong, is fit for using widely.