Pre-filter suitable for oil residue separation

The utility model discloses a prefilter suitable for oil residue separation, which comprises a machine frame and a separation conveying cylinder arranged on the machine frame, a spiral main shaft is arranged in the separation conveying cylinder, and a driving mechanism used for driving the spiral main shaft to rotate is arranged on the machine frame. The end, away from the driving mechanism, of the separating and conveying barrel is sequentially and fixedly connected with an oil filtering barrel and a discharging barrel, the spiral main shaft extends into the discharging barrel, the size of the spiral main shaft is matched with that of the oil filtering barrel, and an annular discharging cavity is defined between the spiral main shaft and the discharging barrel; and an oil collecting tank is arranged below the separating and conveying barrel and the oil filtering barrel. The oil residue separation device is compact in overall structure, reasonable in layout, capable of efficiently completing oil residue separ