The invention relates to the technical field of mixed compound processing, in particular to a filtering, extruding and cutting-off system for mixed compounds. The filtering, extruding and cutting-offsystem comprises a lifting device, a sheet-compressing device, an extruding conveying device and a filtering and cutting-off device, the lifting device comprises a lifting roller, the discharging sideof the lifting roller is located above the filtering device, the sheet-compressing device is mounted between the lifting roller and a feeding inlet of the extruding conveying device, the filtering and cutting-off device is mounted at a discharging outlet of the extruding conveying device, the lifting roller is used for lifting the to-be-filtered strip-shaped mixed compounds to the upper part of the extruding conveying device, the sheet-compressing device is used for bearing the strip-shaped mixed compounds guided out by the lifting roller, pre-compressing the strip-shaped mixed compounds andguiding the strip-shaped mixed compounds into the feeding inlet of the extruding conveying device, and after the strip-shaped mixed compounds are guided into the extruding conveying device, the multiple side-by-side strip-shaped mixed compounds are formed through the filtering and cutting-off device and cut off.