Method for preparing feed ingredients from kitchen wastes

The invention discloses a method for preparing feed ingredients from kitchen wastes. The method comprises the following steps: (1) solid-liquid separation: performing solid-liquid separation on the kitchen wastes through a filter device, performing oil-water separation treatment on liquid obtained by solid-liquid separation, and performing solid-solid separation on a solid mixture obtained by solid-liquid separation, wherein the solid mixture contains plastic products, metal products and food residues at the same time; (2) solid-solid separation: putting the plastic products and the metal products which are subjected to separation into the solid kitchen waste retreatment procedure, and putting the separated solid food residues into the dehydration treatment procedure; (3) dehydration treatment procedure: dehydrating and deoiling the solid food residues until the moisture content is below 60 percent, putting the treated solid food residues into the drying treatment procedure, and performing oil-water separation treatment on liquid collected by squeezing; (4) drying treatment procedure: drying the solid food residues at high temperature to obtain the feed ingredients. The process is simple and controllable; the industrial chain of production is complete, so that the problem of incomplete treatment is solved.