Organic wastewater pretreatment device

The utility model provides an organic wastewater pretreatment device, which relates to the technical field of wastewater treatment and comprises a filtering cavity and a stirring cavity which are hermetically communicated, a driving motor is fixed below the stirring cavity; the output end of the driving motor is connected with a rotating shaft; a first gear is coaxially arranged at the other end of the rotating shaft; the first gear is engaged with a second gear; the second gear is coaxially connected with a screw rod; the screw rod extends into the filtering cavity; a filter screen is arranged on one side wall in the filter cavity; the filter screen is arranged above the screw rod; an opening is formed in one side wall, opposite to the filter screen, in the filter cavity; a collecting box is arranged outside the filtering cavity close to the opening; the filter screen extends into the collecting box outside the filter cavity from the opening; a slag scraping plate is movably arranged on the filter screen in