The invention provides screening and washing equipment before processing of vegetable seeds. The equipment comprises a horn type vegetable seed inlet pipe, a rail groove, a filter component shelf, a filter component, a middle baffle plate, a filter component, an outlet pipe, a connecting pipe, a roller component, a motor and a water inlet pipe; the filter component is arranged above the outlet pipe; the middle baffle plate is mounted above the filter component; the filter component shelf is assembled above the middle baffle plate; the filter component is mounted on the filter component shelf; the back end of the filter component is connected with the rail groove; the upper end of the filter component is connected with the motor; the water inlet pipe is arranged on the left side of the motor; the horn type vegetable seed inlet pipe is mounted on the left side of the water inlet pipe; the connecting pipe is arranged at the right end of the middle baffle plate; and the filter component is below the left end of the lower part of the connecting pipe. The equipment realizes the screening and washing treatment of the vegetable seeds, solves such problems as reduction of the quality of rapeseed oil due to impurities, is convenient for use and operation, improves the screening and washing effect, and is high in reliability.