The utility model discloses a waste water pretreatment device for a food factory, which belongs to the field of
sewage treatment devices and is characterized by comprising a box body, a water outlet and a motor are mounted on the side wall of the box body, a filtering
barrel is rotatably mounted in the box body, the output end of the motor is fixedly connected with the filtering
barrel, and a support is mounted on the inner wall of the filtering
barrel. A water inlet
pipe is fixedly connected to the middle of the support, penetrates through the outer wall of the box body and is rotationally connected with the box body, two electric push rods are installed on the outer side wall of the box body, the output ends of the electric push rods extend into the box body, first sealing plates are fixed to the output ends of the electric push rods, and the first sealing plates are matched with the filtering barrels and rotationally installed on the outer wall of the water inlet
pipe; a rolling bearing is installed on the outer wall of the water inlet
pipe, a water inlet is formed in the outer wall of the rolling bearing, a residue discharging opening is formed in the inner bottom face of the box body, and a sealing device is arranged at the residue discharging opening.