The invention discloses miniaturized multipurpose treatment equipment for separating and dewatering restaurant garbage, belonging to the field of dewatering. The miniaturized multipurpose treatment equipment comprises a motor, a coupling, an exhausting/cleaning port, a discharge port adjusting device, an isodiametric threaded section, a pressure buildup section, a reducing threaded section, a rotary connecting mechanism, a liquid part collection tank, a liquid part collection tank discharge port, a bag breaking hook, an isodiametric conveying threaded section, a screw rod core shaft, a dynamic seal, an extrusion dehydration upper machine barrel, a sewage outlet, a liquid part storage box upper opening, an extrusion dehydration lower machine barrel, a solid part storage box, a liquid part storage box, a hydraulic support adjusting mechanism, a filter plate, a liquid outlet, a connecting hose, a solid part cleaning port, an oil drainage port and an automatic control system. The liquid part collection tank is connected with the lower machine barrel, and the liquid part filtered by the filter plate is guided into the liquid part storage box through the liquid part collection tank discharge port and the connecting hose. The remaining solid part after material dehydration is discharged into the solid part storage box from a machine barrel auxiliary discharge port. The discharge port adjusting device controls the closure of a discharge port by adjusting the position of a rotatable baffle plate to improve the pressure buildup dehydration effect.