Full-mechanical-drive dry pre-treatment device and method for mixed kitchen waste

The invention discloses a full-mechanical-drive dry pre-treatment device and method for mixed kitchen waste. The device comprises an organic matter and impurity separation unit, an organic matter breaking unit, a solid-liquid separation unit and a biomass energy raw material extraction unit. Overall design is adopted in the device, the whole pre-treatment process can be conducted in the integrated device, impurity removal is put in the first place according to a whole system, and therefore the interference of impurities to following pre-treatment is effectively avoided; integrated phased treatment and separation of the mixed kitchen waste are achieved through the change of the operating direction of a conveying belt and the rolling design of steel balls; efficient breakage of organic matter components with different hardness degrees is achieved through the design of a swingable breaking cutter; the solid-liquid separation device is squeezed by a piston, and multi-stage integrated continuous operation of unloading, squeezing, solid-liquid separation and residue discharging is achieved. Dry treatment operation is carried out by the whole device, and therefore the defects that wet treatment steps are complex, the treatment effect is not easily controlled, and sewage and other secondary pollution are easily generated are avoided.