Full-section overflowing mechanism of restaurant wastewater pre-treatment device and full-section overflowing method

The invention discloses a full-section overflowing mechanism of a restaurant wastewater pre-treatment device and a full-section overflowing method. The full-section overflowing mechanism comprises a machine case and a plurality of separation plates mounted in the machine case, wherein the plurality of separation plates comprise three full-section separation plates; two opposite side edges of the first full-section separation plate are fixed at two opposite sides of the machine case respectively and are vertically arranged above a bottom plate of the machine case; a transverse flow channel I isformed between the lower end of the first full-section separation plate and the bottom plate and the upper end of the first full-section separation plate is not in contact with a top plate of the machine case, so that the machine case is divided into an oil-water separation region and a liquid discharging region, which pass through the transverse flow channel I and are mutually communicated; thesecond full-section separation plate is located in the liquid discharging region; the upper end of the second full-section separation plate is fixed on the top plate and the lower end of the second full-section separation plate is not in contact with the bottom plate; meanwhile, a transverse flow channel II is formed between the upper end of the second full-section separation plate and the bottomplate; the lower end of the third full-section separation plate is vertically fixed on the bottom plate, and a vertical flow channel capable of enabling liquid to flow out from the upper end of the third full-section separation plate under the action of static pressure is formed by the lower end of the third full-section separation plate, the second full-section separation plate and the machine case.