The invention discloses a residue settling and sand washing separation apparatus and belongs to the technical field of separation settling and conveying equipment for sand before anaerobic reaction of kitchen waste; the apparatus comprises a sand settling storage tank, a sand discharge conveyer is connected to the bottom of the sand settling storage tank, the outer wall of the top of the sand settling storage tank is provided with a liquid outlet, one end of a guide barrel is upwardly provided with a feed port, a barrel body of the guide barrel is positioned below the feed port, and stirring unit blades and a rubbing device are positioned at the outlet end of the guide barrel. Organic slurry and sand in kitchen waste are separated by the apparatus along with settling and conveying integrated, floor area is reduced, investment is reduced, working efficiency is improved, mechanical properties are good, and the service life is long; by adding the rubbing device to the outlet end of the guide barrel, it is easier to separate organics and sand; by adding a sand settling retaining plate in the sand settling storage tank, it is easier to settle the sand, and the sand settling to the bottom is protected from stirring influence from a stirring unit.